Kenwood TM-V7A Service Manual

TM-V7A/E
ADJUSTMENT
Measurement Adjustment Specifications/
Item Condition Test- . . . Remarks
equipment Unit Terminal Unit Parts Method
3. DEV 1) V band Step 7-1 Linear Rear ANT TX-RX VR2 #4.2kHz | +200Hz
FREQ.:CH4 detector | panel (+, ~ with a
AG: 1kHz25mV:E Oscilloscope larger value)
AG:1kHz50mV:K,M AG
Transmission
2) Down AG output from Check h2.3~4.2kHz:E
the above state by #2.4~4.1kHz:K,M
20d0B (1kHz/2.5mV):E
20dB (1kHz/5.0mV):K,M
Transmission
3) U band Step 7-2 TX-RX VR1 £4.2kHz =£200Hz
FREQ.:CH4 (+, -witha .
AG: 1kHz25mV:E larger value)
AG:1kHz50mV:K,M .
Transmission
4) Down AG output from Check #2.3~4.2kHz:E
the above state by 2.4~4.1kHz:K,M
20dB (1kHz/2.5mV):E
20dB (1kHz/5.0mV):K,M
Transmission
4. TONE 1) V band Step 8-1 Linear Rear ANT Check +0.5~1.3kHz
FREQ.:CH7 detector | panel
Transmission Oscilloscope
2) U band Step 8-2
FREQ.:CH7
Transmission
5. Protection 1) V band Step 10-1 Ammeter Check 12.0A or less
FREQ.:CH4
ANT:short circuit and
open
Transmission
2) U band Step 10-2 10.0A or less
FREQ.:CH4
ANT:short circuit and
open
Transmission
Reference] Adjustment modes and their contents of the set
No. Item Information display Remarks
1 |All displays lighting “All lighting" LCD lights off when depressing [F] and [TONE] keys.
All reset "All Reset? All reset is executed by depressing [MR] key.
Press[MR]” All reset is not executed by depressing other than [MR] key.
2 |High level input S/N, [1-1] VHF(V-C), MRich
Distortion, .
AF output and [1-2] UHF(U-C), MRich
Current confirmation
3 {Receiving sensitivity [2-1] VHF(V-C), MRich
confirmation [2-2] - VHF(V-L), MR2ch
[2-3] VHF(V-H). MR&ch
[2-4] UHF(U-C). MRich
[2-5] UHF(U-L), MR2ch
[2-6] UHF(U-H), MR3ch
[2-7] UHF(SU-C), UXU ON, MRich
[2-8] VHF(SV-C), VXV ON, MRich
50

Kenwood TM-V7A Specifications

General Specifications

VHF frequency range	144~148MHz
UHF frequency range	438~450MHz (U.S.A/Canada)
Antenna impedance	50Ω
Usable temperature range	-20°C to +60°C (-4°F to +140°F)
Power supply	13.8V DC ±15% (11.7~15.8V)
Grounding method	Negative-ground
Frequency stability	±3ppm (-10°C to +50°C)
Dimensions (W x H x D)	140 x 54.5 x 205.5 mm

Transmitter Specifications

High power output	50W (VHF) / 35W (UHF)
Mid power output	Approx. 10W
Low power output	Approx. 5W
Spurious emissions	-60dB or less
Maximum frequency deviation	±5kHz
Audio distortion	3% or less (at 60% modulation)
Microphone impedance	600Ω

Receiver Specifications

Circuitry	Double conversion
Intermediate frequency (1st / 2nd)	38.85MHz / 450kHz and 45.05MHz / 455kHz
Sensitivity (VHF or UHF band)	0.16μV or less (12dB SINAD)
Sensitivity (Sub VHF or UHF band)	0.25μV or less
Selectivity (-6dB)	12kHz or more
Selectivity (-60dB)	28kHz or less
Squelch sensitivity	0.1μV or less
Audio output	2W or higher (8 ohms, 5% distortion)
Audio output impedance	8Ω

Weight and Dimensions

Weight	1.2 kg (2.6 lb)
Dimensions (W x H x D)	5.51" x 2.15" x 8.09"