ABELL TH-308G VHF Service Manual
- 40 -
ADJUSTMENT
Required test Equipment
1
.
Stability power supply
1
.
The supply voltage can be changed between 5V and 18V, and the current is 3A or
more.
2
.
The standard voltage is 7.5V
2
.
DC Ammeter
1
.
Class 1 ammeter (17ranges and other features).
2
.
The full scare can be set to either 300mA or 3A.
3
.
A cable of less internal loss must to be used.
3
.
Frequency counter (F. Counter)
1
.
Frequency of 1GHz or so can be measured
。
2
.
The sensitive can be changed to 500MHz or blow, and measurements are highly
stable and accurate. (about 0.2ppm)
。
4
.
Power Meter
1
.
Measurable frequency
:
Up to 500MHz
2
.
Impedance
:
50
Ω
, instability
。
3
.
Measuring range
:
full scare of 10W or so
。
4
.
A standard cable (5D2W 1m) must be used
。
5
.
RF Voltmeter(RF V.M)
1
.
Frequency range
:
up to 500MHz or so.
6
.
Linear Detector
1
.
Frequency range
:
up to 500MHz or so.
Characteristics are flat, CN is 60dB or more.
7
.
Digital Voltmeter
1
.
Voltage range
:
FS=18V or so.
2
.
Input resistance: 1M
Ω
or more
8
.
Oscillograph
1
.
Measuring range
:
DC to 30MHZ
。
2
.
Provide highly accurate measurements for5 to 25MHz.
9
.
AF Voltmeter (AF V.M)
1
.
Measuring range
:
50Hz to 1MHz
2
.
Maximum sensitivity
:
1mV or more.
Summary of Contents for TH308G
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Page 40: ...ABELL TH 308G VHF Service Manual 39 PACKING ...
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