to amateurs that share an appreciation of design and value.
110db dynamic range and
+40dbm 3rd order intercept point (ip3)
the 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)..
ssb data mode
when you narrow the if filter passband to 500hz or less in ssb mode or ssb-data mode operation, the ic-7700 automatically selects special band pass filters (bpf). the bpf has a very sharp edge like a cw filter for better rejection of interfering signals. along with the bpf setting, the ic-7700 has a 1/4-tuning step function for easier tuning operation.
firmware upgrade for maintaining the best performance
icom will always provide the latest firmware for keeping the radio up to date. just download the latest firmware from the icom web site whenever a new version has been uploaded, and update your ic-7700 via the usb memory.
please check;
http://www.icom.co.jp/world/support/download/firm/index.html200w output power at full duty cycle, full power operation
the ic-7700 uses two mrf150 power amplifiers connected in push-pull configuration. the power amplifiers provide a reliable 200w of output power up to 54mhz. the effective quad cooling fan system makes it possible to generate 200w full power output even during full duty cycle operation. the digital psn modulator using a dsp unit consistently reproduces an outstanding signal-to-noise ratio, providing clean and clear transmission. the pa amplifier uses a 48v dc supply to provide output power with low imd on all bands.
microphone equalizer and adjustable transmit bandwidth
the built-in audio equalizer has separate bass and treble adjustments for a total of 121 combinations, so you can adjust the tonal quality of your voice as your want. in addition, the transmit bandwidth is selectable from 100, 200, 300, 500hz at the lowpass edge, and 2500, 2700, 2800, 2900hz at the high-pass edge, respectively. three types of high and low combinations can be stored in the memory as favorite settings. with this flexibility of dsp-based waveform shaping, transmit audio quality is adjustable to your preference.
high speed automatic
antenna tuner covering hf to 50mhz band
the high speed automatic antenna tuner automatically performs tuning operations and memorizes the setting in 100khz steps. once the tuner memorizes the setting depending on frequency, the tuner recalls the setting and matches the antenna instantly. in addition, high-voltage parts allow you reliable, continuous 200w operation even at high duty cycles.
other 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
rear panel view
antenna connectors
ground terminal
breaker switch
external display connector
(d-sub 15-pin, vga)
ethernet connector
ci-v remote control jack
rs-232c connector
main switch
ac power cord receptacle
receive antenna connector
transverter jack
external dc output jack
s-meter output jack
external memory keypad jack
external speaker jack
acc sockets a/b
tx/rx control jack (relay)
alc input jack
alc level pot
key jack
s/p dif in/out jacks
reference frequency in/out jack
ic-7700内置自动天调、电源。确实是好机啊~ :eek:
