Kenwood TM-V7A Service Manual

TM-V7A/E
ADJUSTMENT
Measurement Adjustment Specifications/
ttem
Condition
Test-
equipment
Unit
Terminal
Unit
Parts
Method
Remarks
2. Sensitivity
1)
V band
step 2-1
FREQ.:CH1
step 2-2
FREQ.:CH2
step 2-3
FREQ.:CH3
SSG:~—122dBm
2)
U band
step 2-4
FREQ.:CH1
step 2-5
FREQ.:CH2
step 2-6
FREQ.:CH3
SSG:—122dBm
3)
U2 band
step 2-7
FREQ.:CH1
SSG:—118dBm
4)
V2 band
step 2-8
FREQ.:CH1
SSG:—118dBm
Distortion
meter
Oscilloscope
AF V.M
Rear
panel
EXP. SP1
Check
SINAD 12dB or more
SINAD 12dB or more
SINAD 12dB or more
SINAD 12dB or more
3. Squelch
V band
step 3-1
FREQ.:CH1
Set to the point where
noise will be erased
by turning the squelch
knob.
2)
SSG:—130dBm
3)
Squeich knob:
clockwise MAX
4)
U band
step 3-2
FREQ.:CH1
Set to the point where
noise will be erased
Oscilloscope
SSG
Rear
panel
EXP. SP1
Check
Knob position:
8:00~11:00
BUSY lights off.
Squeich open.
BUSY lights on.
AF output disappear.
BUSY lights off.
Knob position:
8:00~ 11:00
BUSY lights off.
by turning the squelch
knob.
5)
SSG:—130dBm
Squelich
open.
BUSY fights on.
6)
Squetch
knob:
AF
output
disappear.
clockwise
MAX
BUSY
lights
off.
7)
U2
band
Squelch
open.
step
3-3
Note:
FREQ.:CH1 \f not squelch opened,
SSG:—125dBm
minimum
20dB
NQ
is
acceptable.
8) V2 band
step 3-4
FREQ.:CH1
SSG:—125dBm
47

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"