Specifications

Reprinted from October 2011 QST © ARRL
Table 1
ICOM IC-7410, serial number 02001081
Receiver Receiver Dynamic Testing
Second-order intercept point: Not specified. Preamp off/1/2, +65, +65, +65 dBm.
52 MHz, +77 dBm.
DSP noise reduction: Not specified. Variable, 20 dB maximum.
Notch filter depth: Not specified. Manual notch: 52 dB, Auto notch: 55 dB,
attack time 100 ms.***
FM adjacent channel rejection: Not specified. 29 MHz, 77 dB
†
; 52 MHz, 79 dB.
†
FM two-tone, third-order IMD dynamic range: 20 kHz offset, both preamps on: 29 MHz,
Not specified. 77 dB
†
; 52 MHz, 79 dB
†
.
10 MHz channel spacing: 29 MHz, 115 dB,
52 MHz, 114 dB.
S-meter sensitivity: Not specified. S9 signal at 14.2 MHz: preamp off, 50 µV;
preamp 1, 23.4 µV; preamp 2, 8.9 µV.
Squelch sensitivity: SSB, <5.6 µV, FM, At threshold, both preamps, SSB, 0.63 µV;
<0.32 µV. FM, 29 MHz, 0.1 µV; 52 MHz, 0.1 µV.
Receiver audio output: >2 W into 8 W at 2.04 W at 10% THD into 8 W.
10% THD. THD at 1 V RMS, 0.85%.
IF/audio response: Not specified. Range at –6 dB points, (bandwidth):
‡
CW (500 Hz): 280-795 Hz (515 Hz).
Equivalent Rectangular BW: 509 Hz.
USB: (2.4 kHz): 197-2770 Hz (2573 Hz).
LSB: (2.4 kHz): 200-2770 Hz (2570 Hz).
AM: (6 kHz): 165-3138 Hz (5946 Hz).
AM: (9 kHz): 163-4496 Hz (8666 Hz).
Spurious and image rejection: HF and 50 MHz, First IF rejection: 14 MHz, 105 dB;
(except IF rejection on 50 MHz): >70 dB. 50 MHz, 81 dB. Image rejection:
14 MHz, >144 dB; 50 MHz, >141 dB.
Transmitter Transmitter Dynamic Testing
Power output: HF and 50 MHz: SSB, CW, RTTY, HF: CW, SSB, RTTY, FM typically
FM, 2-100 W; AM, 2-27 W. 1.2-102 W, AM, 0.27-27 W;
50 MHz: CW, SSB, RTTY, FM,
1.2-95 W, AM, 0.2-24 W.
Spurious-signal and harmonic suppression: HF, >70 dB; 50 MHz, >70 dB.
>50 dB on HF, >63 dB on 50 MHz. Meets FCC requirements.
SSB carrier suppression: >40 dB. 57 dB.
Undesired sideband suppression: >55 dB. >70 dB.
Third-order intermodulation distortion (IMD) 3rd/5th/7th/9th order (15 m, worst case):
products: Not specified. HF, 100 W PEP, –30/–35/–54/–61 dB;
50 MHz, 100 W PEP, –31/–34/–43/–59 dB.
CW keyer speed range: Not specified. 6 to 48 WPM.
CW keying characteristics: Not specified. See Figures 1 and 2.
Iambic keying mode: Not specified. Mode B.
Transmit-receive turnaround time (PTT release S9 signal, 85 ms at speaker, 16 ms at
to 50% audio output): Not specified. accessory jack.
Receive-transmit turnaround time (tx delay): SSB, 45 ms; FM, 8 ms.
Not specified.
Composite transmitted noise: Not specified. See Figure 3.
Size (height, width, depth): 4.6 × 12.3 × 13.5 inches; weight, 22.5 pounds.
Price: $2000; FL-430 (6 kHz) and FL-431 (3 kHz) roofing filters, $125 each.
*No blocking occurred up to threshold of receiver overload.
**ARRL Product Review testing now includes Two-Tone IMD results at several signal levels.
Two-Tone, 3rd-Order Dynamic Range figures comparable to previous reviews are shown
on the first line in each group. The “IP3” column is the calculated Third-Order Intercept Point.
Second-order intercept points were determined using –97 dBm reference.
***Single beat note. Reduces two beat notes up to 55 dB with attack time depending of separation
of signals, typically 400 ms.
†
Measurement was noise-limited at the value indicated.
‡
Default values, sharp setting (smooth setting is available). Bandwidth and cutoff frequencies
are adjustable via DSP. CW bandwidth varies with PBT and pitch control settings.
Figure 1 — CW keying waveform for the
IC-7410 showing the first two dits in full
break-in (QSK) mode using external keying.
Equivalent keying speed is 60 WPM. The
upper trace is the actual key closure; the
lower trace is the RF envelope. (Note that
the first key closure starts at the left edge
of the figure.) Horizontal divisions are 10
ms. The transceiver was being operated at
100 W output on the 14 MHz band.
Figure 3 — Spectral display of the IC-7410
transmitter output during composite noise
testing. Power output is 100 W on the 14 MHz
band. The carrier, off the left edge of the plot,
is not shown. This plot shows composite
transmitted noise 100 Hz to 1 MHz from the
carrier. The reference level is 0 dBc, and the
vertical scale is in dBc/Hz.
Figure 2 — Spectral display of the IC-7410
transmitter during keying sideband testing.
Equivalent keying speed is 60 WPM using
external keying. Spectrum analyzer resolution
bandwidth is 10 Hz, and the sweep time is 30
seconds. The transmitter was being operated
at 100 W PEP output on the 14 MHz band. This
plot shows the transmitter output ±5 kHz from
the carrier. The reference level is 0 dBc, and
the vertical scale is in dB. Note that the keying
sideband level rises slightly at the edges, to
the –60 dB range.
Time (s)
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08
QS1110-ProdRev01
Frequency in kHz
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c
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c
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c
-2 f
c
+2 f
c
+4
Reponse, dB
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Response in dBc/Hz
Frequency in Hz
QS1110-Prodrev03
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