Yaesu FT-7100M, Technical Supplement

Page: 10 / 68

10
DATA
EXT SP
13.8VDC
ANT
Alignment
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be connect-
ed to the main antenna jack in all procedures that call for
transmission, except where specified otherwise. Correct
alignment is not possible with an antenna. After complet-
ing one step, read the following step to determine wheth-
er the same test equipment will be required. If not, re-
move the test equipment (except dummy load and watt-
meter, if connected) before proceeding.
Correct alignment requires that the ambient tempera-
ture in the repair shop be the same as that of the trans-
Power Supply
10 ~17 V DC, 15A
RF Signal
Generator
Inline Wattmeter
Deviation
Meter
ATT
ceiver and test equipment, and that this temperature be
held constant between 68 °F and 86 °F (20 °C ~ 30 °C).
When the transceiver is brought into the shop from hot or
cold air it should be allowed some time for thermal equal-
ization with the environment before alignment. If possi-
ble, alignments should be made with oscillator shields and
circuit boards firmly affixed in place. Also, the test equip-
ment must be thoroughly warmed up before beginning.
Note: Signal levels in dB referred to in alignment are based on
0 dBµ = 0.5 µV. (closed circuit).
Frequency
Counter
Dummy Load