IC-7700 HF/50MHz Transceiver
IP3 performance of a radio can be improved by sacrificing sensitivity, but Icom considers this a poor choice. To achieve REAL high-performance, Icom reviewed all of the analog receiver circuitry. The IC-7700 employs mechanical relay BPF switching, a digitally tuned pre-selector, and three Hi-spec 1st IF filters (roofing filter) in a Dynamic range characteristics (in 14MHz band) clean and simple double-conversion superheterodyne design. By balancing the analog and DSP functions, the IC-7700 provides superior sensitivity simultaneously with a superb dynamic range of 110dB, and +40 dBm IP3 (even in USB mode with 2.4 kHz filter bandwidth).
- 110dB dynamic range and +40dBm 3rd order Intercept Point (IP3)
- Better than +110dBm 2nd order intercept point (IP2)
- Double conversion superheterodyne system
- High specification inband IMD
- Inband IMD characteristics
- Band pass filter
- DIGI-SEL (Digital pre-selector)
- Pre-amplifiers
- 1st mixer
- Three Hi-Spec 1st IF filters (Roofing Filter)*1
- 2nd-stage image rejection mixer
- 50MHz band preamplifier and mixer
- Two AGC Loops
- High stability OCXO unit
- The well-selected components provide premium performance
- Mechanical relays
- Hi-spec 1st IF filter
- Large coils
- DSP
- Power amplifiers.
- 7-inch wide color TFT LCD
- USB ports on the front panel
- RTTY /PSK31 operation without PC connection
- 4 antenna connectors
- Real time spectrum scope
- Digital twin PBT
- digital IF filter
- Manual notch filter and auto notch filter
- Variable noise blanker
- Noise reduction
- Digital voice recorder
- RX audio HPF/LPF setting
- S/P DIF interface
- SSB data mode
- Firmware upgrade for maintaining the best performance
- 200W output power at full duty cycle, full power operation
- Microphone equalizer and adjustable transmit bandwidth
- High speed automatic antenna tuner covering HF to 50MHz band
- Memory keyer
Other IC-7700 features
[Antenna line]
- BNC type RX IN/OUT connectors for receiver antenna or external attenuator
[Receiver]
- General coverage receiver covers from 30kHz to 60MHz
(* Some frequency bands are not guaranteed, depending on version) - 4-step attenuator (6/12/18dB and OFF)
- Twin peak audio filter for RTTY operation
[Transmitter]
- Low distortion RF speech compressor
- Tx monitor
- 50 CTCSS tone encoder and decoder
- All mode power control
- VOX capability (Voice operated transmission)
[CW]
- Multi-function electronic keyer with adjustable keying speed, dot-dash ratio and paddle polarity and bug key function
- DSP controlled CW keying waveform shaping
- Frequency lock function for split operation
- The normal (default) CW carrier point is selectable from USB and LSB
- APF (audio peak filter) function with soft/sharp filter shape
- Double key jack system
- Full break-in function
- CW pitch control from 300 to 900Hz
- CW/AM auto tuning function
[Operation]
- Set mode function for flexible and speedy setting
- Memory pad stores up to 10 (or 5) operating frequencies
- Quick split function enables split operation with a single action
- SSB/CW synchronous tuning
- Single knob control from squelch volume to RF gain
- RIT and ∂Tx variable up to ±9.999kHz
- Quick RIT/∂TX clear function
- UTC/Local Clock and timer function
- 1Hz pitch tuning and 1Hz indication
- 101 memory channels with 10-character comment
- Built-in voice synthesizer announces operating frequency, mode and receiving signal strength
- Programmed scan, memory scan, select memory scan, VSC scan and ∂F scan
- Auto tuning step function
- Band edge beep
- Main dial tension control and dial lock
- CI-V interface capability and RS-232C connector for PC connection
- BNC type Transverter connector
- Triple band stacking register
- FFT scope wave averaging function
- Screen saver function