Icom IC-9700 Beginner’s Guide: Setup, Operation and Software
2-meter/70-centimeter/23-centimeter all-mode weak-signal and satellite station. US operating context.
Start with the right model and station
The Icom IC-9700 is a 2-meter/70-centimeter/23-centimeter all-mode weak-signal and satellite station. This is a VHF/UHF/23-centimeter radio, not an HF replacement. FM repeaters, weak-signal SSB/digital operation and satellites require different antenna, mode and frequency plans.
Work through receive, one controlled transmission and one saved working configuration before adding automation. Your radio’s receive coverage is not a statement of your transmit privileges. Regional versions and installed options can change coverage and available functions.
For US operation, use the frequencies and modes your authorization permits, listen before transmitting and identify as required. Keep antennas clear of people and electrical lines. Assess RF exposure with a method appropriate to the installation; do not treat an SWR measurement as a safety assessment.
Icom model specifications, manuals and supported accessories.
Important IC-9700 setup differences
- Connect each antenna to the correct band output. Coax loss becomes increasingly important as operating frequency rises.
- For weak-signal work use the correct mode and antenna polarization for the other station; an FM repeater setup is not an SSB setup.
- For satellite operation confirm current uplink/downlink information, tracking, polarity and full-duplex behavior before transmitting. Do not start with automatic Doppler control.
- Treat frequency stability, reference input configuration and current firmware as separate checks when using narrow digital modes. Never assume a software correction compensates for every station error.
Prepare the station before powering up
- Exact-model manual and a way to save a configuration backup.
- Antenna and feed system matched to the operating band; correct connectors and supported strain relief.
- The exact manufacturer-specified power source, leads and protective devices for this model.
- A rated dummy load or other appropriate controlled test arrangement for transmitter checks.
- For software, the exact-model programmer or supported CAT application, its required driver and the documented data cable or memory-card method.
Read the power specification for this exact model instead of copying an AC/DC supply rating from another radio. Check cable polarity and connector type with power off. Install a mobile only where it cannot interfere with vehicle controls or airbags; operate its menus while parked.
First start: build a repeatable receive baseline
- Inspect the antenna connector, power lead or battery, and accessory covers with the radio off. Resolve visible damage before continuing.
- Connect the correct antenna and approved power arrangement. Support external cables so they do not lever on a portable radio’s connectors.
- Turn the radio on with audio low, raise volume gently and set squelch/RF gain appropriately. Confirm the active operating side and mode.
- Tune a known receive signal in a supported band. Verify clear audio before changing advanced filtering, digital routing or computer settings.
- Save or record the working state using the documented backup method before experimenting. Keep an untouched copy off the radio.
For a dual-receiver radio, prove one receiver before enabling dual watch. For a separate-head radio, confirm the head/RF-unit link before diagnosing the antenna. For a handheld, test a charged battery before attaching programming accessories.
Create a model-specific computer profile
Start from the IC-9700 manual’s computer/USB section. Record the actual serial interfaces, audio device names, selected data input, baud and CI-V settings. Do not copy the original IC-7300’s address or a COM number from a video. A supported exact-model profile must agree with the radio’s configured identity.
Test CAT with transmission disabled, then verify receive audio and finally a short controlled low-power transmit test. Preserve normal microphone routing for voice. If a program lacks a documented profile for your model, update or consult the software’s support instructions rather than guessing another model.
Understand the controls by the job they do
- VFO / memory: VFO is free tuning; memories recall saved settings. Check which you are using if tuning behaves unexpectedly.
- A/B and SPLIT: split can separate receive and transmit frequencies. Leave it off for ordinary first contacts, and verify both frequencies before answering a station working split.
- RIT: offsets reception without normally moving transmit frequency. Clear it when comparing software and radio displays.
- RF POWER: sets the output ceiling. An SSB power meter follows speech peaks; little indicated output while you are silent is normal.
- MIC GAIN / USB modulation: microphone gain belongs to voice input. USB modulation and computer playback level govern computer audio.
- P.AMP / ATT: extra gain can help weak signals, but attenuation can improve an overloaded receiver. A brighter waterfall is not automatically better reception.
- NB / NR / NOTCH: try one processing tool at a time. Excess noise reduction can turn intelligible speech into watery audio.
- SWR / ALC: SWR concerns the transmitter load; ALC concerns transmit level control. Neither measures contact range.
CW without accidental transmission
Begin by listening in CW mode. Set a comfortable pitch, tune the signal and narrow the filter only enough to separate adjacent stations. You can learn reception without transmitting.
Before connecting a key or paddle, disable transmit break-in. Select the matching key/keyer type and a slow practice speed, and verify the plug wiring against both manuals. Practice without RF, then test at low power into a rated dummy load. Enable break-in only when you intend to transmit. CAT frequency control is not automatically CW keying; use the documented keying method for your logger and interface.
USB: separate control from sound
On a documented USB control/audio connection, separate these jobs: CAT/CI-V commands change frequency and mode; receive audio goes to the decoder; transmit audio goes from the application into the radio. PTT keys the transmitter. Passing Test CAT does not prove that any audio path works.
Use Icom’s model-matched driver and follow its installation order. Identify the actual serial device and radio audio input/output in your operating system. Write them down. Someone else’s COM number is not your station’s required number. Close competing radio programs during the first test.
Keep system notification sounds on normal computer speakers, not the radio output. Disable enhancement or automatic level processing on radio audio where available. Recheck selected devices after reconnecting USB, changing docks or updating the operating system.
WSJT-X: FT8/FT4 from receive to first contact
- Identity: install the official release for your operating system and enter your call sign and grid. Leave Enable Tx off.
- Radio: select a current, supported exact-model profile for IC-9700, its actual serial port, matching baud and CAT PTT. Test CAT; confirm a software frequency change reaches the radio.
- Audio: select the radio’s USB input/output, not your laptop microphone or speakers. Select Data/Pkt mode behavior and confirm the radio enters its intended USB data mode.
- Receive: synchronize the computer clock through its normal time service. Confirm the selected mode/frequency matches the activity. Set input level without clipping and pass the needed audio range through the radio filter. Decode several cycles.
- Low-power transmit test: use a rated dummy load. Keep compression off, start with low computer audio and key only briefly. Raise drive gently while watching RF and ALC; avoid heavy ALC and distorted output. Confirm immediate return to receive.
- On-air operation: connect the verified antenna with power off. Check the complete transmitted signal fits within your authorized segment, including audio offset. Configure Rig or Fake It split as supported and verify the resulting transmit frequency. Start modestly and monitor temperature during repeated cycles.
- Finish: disable transmission, confirm receive state and save your working settings.
Do not try to fix a blank waterfall with more transmit power. A waterfall proves audio activity, not correct clock timing or successful decoding.
fldigi + flrig: let one program own the serial port
Configure flrig using its IC-9700 instructions and confirm frequency tracking. Then let fldigi use flrig for control while fldigi uses the radio USB audio device for sound. Do not simultaneously enable a second direct CAT backend against the same port.
Select the intended mode, decode a known signal, then check a short low-power transmission into the dummy load. Save the audio configuration. Review macros before using them: replace sample call signs and remove information you do not intend to transmit. Audio PSK/RTTY through SSB and true FSK keying are different methods; do not apply an FSK wiring recipe to an audio-only configuration.
Logging and N1MM Logger+ integration
Begin with one contact and verify call sign, UTC, band, mode and power in the log. Keep native database backups as well as ADIF interchange exports before a large import or merge.
Configure the IC-9700 control port in N1MM and confirm frequency/mode tracking. For WSJT-X integration, follow N1MM’s documented workflow rather than independently opening the physical port in both programs. Configure UDP exchange after basic radio operation works and verify one QSO produces one correct log entry. Contest exchanges, categories and assisted-operation rules depend on the contest; defaults are not a substitute for reading its rules.
Troubleshooting by symptom
| Symptom | Next check |
|---|---|
| No receiver sound | Check AF, squelch, headphones and antenna. Return to a recorded receive baseline. |
| CAT fails | Check actual serial device, matched baud/address and competing port owners. Test with one application. |
| CAT works; blank waterfall | Check audio input, permission, mute and recording level. Inspect the OS input meter on a known signal. |
| Waterfall but no decodes | Check clock, mode, working frequency, clipping and receive filter. |
| PTT works; little RF | Check transmit audio device, data input routing and actual audio drive. Use a short dummy-load test. |
| Transmits when software opens | Stop the application and restore receive. Inspect RTS/DTR assignments, VOX and automatic functions before reconnecting. |
| USB drops on transmit | Compare low power into a dummy load against the antenna. Investigate DC voltage drop, connectors and common-mode RF. |
| Voice stopped after digital work | Return to normal SSB and restore the recorded microphone input. |
| High SWR or failed tune | Stop transmitting. Inspect antenna, band choice and feedline; do not repeatedly force tuning. |
| Digital signal sounds distorted | Reduce audio drive and processing. Inspect ALC and obtain an independent report. |
Change one variable at a time and record the result. A factory reset comes after backup and diagnosis, not before.
Useful tricks and recovery habits
- Keep a settings sheet: serial device, baud, audio names, input routing, firmware, application versions and normal power.
- Save voice and digital baselines: use dated backups and explain their differences.
- Prefer the same USB port: this reduces device-renaming surprises; still recheck names after updates.
- Try less gain: compare preamp, attenuation and filter settings before adding processing.
- Separate RF from software: a dummy-load comparison can reveal antenna-related interference without randomly changing every menu.
- End in receive: stop automatic transmissions and confirm PTT is released before leaving the station.
Before firmware work, save settings and copy the SD contents elsewhere. Use only exact-model firmware, a stable power source and the applicable update instructions. The linked page documents a particular release and its backup process; check Icom for the current applicable release rather than assuming that linked version is newest.
Buying a used IC-9700
Ask for the exact model/region, firmware version, supplied microphone and DC lead. Request a demonstration of reception, touchscreen operation, low-power transmit into a proper load, any installed external tuner and documented computer control/audio. Inspect antenna and DC connectors and check cooling operation.
Do not judge SSB transmit health by a power meter while the operator is silent. Do not blindly import the previous owner’s settings: document their working state first, then configure your own station. A missing accessory or a worn connector can matter more than a cosmetic scratch.
Watch radio and software demonstrations
These videos demonstrate the named model or an explicitly documented shared software task. Older firmware and application interfaces may differ. Use the current manual when instructions conflict; example frequencies and device names are not your station settings.
Configuring the IC-9700 for WSJT digital modes
Ham Radio DX model-specific digital setup.
Frequently asked questions
Which manual and programmer should I use?
Use the exact IC-9700 model and regional version. Start with CS-9700 or an application that explicitly documents compatibility.
Should I copy a video’s frequency or port number?
No. Use your authorized local operating plan and actual computer device names. Videos demonstrate a workflow, not universal settings.
What should I do before resetting the radio?
Save a configuration backup, record the symptom and test one variable at a time. A reset can erase useful settings and evidence.
Can an image from a similar radio be written to this one?
Do not cross-write a complete configuration image from a different model. Read the target radio first and import supported records into its own file.
Model manuals and software references
Research checked October 21, 2026. Manufacturer and software-project references are the authority for exact supported versions and accessories.