Acom 700S, Operating Manual, Page: 14 / 30

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3-5.
Control system – buttons and menus
a) The OPR/STB and the BAND buttons are used for manual (local) control of the (Fig. 3-2):
- the left-most button OPR/STB switches over the amplifier between Operate and Stand-by
modes;
- the next two buttons – BAND up and down arrows - change the frequency bands in ascending
or descending order;
b) The right-most button MENU (Fig. 3-2) provides access to the amplifier’s settings and service
functions;
- in each menu the left-most button is always HELP and the right-most – always EXIT;
- the HELP button provides information about the current screen;
For more details of the control system and use of the menus see Section 5. MENUS – USEFUL TOOLS
AND OPTIONS.
3-6.
Test transmission
To make sure that you have installed the amplifier correctly, make a test transmission as described
below. Repeat these tests for each new band and antenna, as well as after installing a new or repaired
antenna, antenna switch, tuner, and / or the connecting cables.
a) Check of RF by-pass path of a non-driven amplifier.
For this check the amplifier must be completely installed and connected according to Section 2, but not
powered by the mains, i.e. the POWER ON switch on the rear panel must be turned off. In any case the
LED above the POWER button must be dark for this test.
First, check if the transceiver’s reception is normal. If you observe a significant worsening of reception,
first check for a problem in the coaxial connections to the amplifier (S. 2-3(d),(e)).
If reception is normal, prepare the transceiver as follows:
- select a continuous carrier mode (CW, RTTY, FM);
- switch the microphone off (decrease the mic gain), disable FSK;
- reduce the output power control to a minimum;
- select a suitable indication so that you can watch the RF power and SWR at the transceiver
output;
- if the transceiver has a built-in antenna tuner – switch it off.
Now in receive mode select a frequency which is not occupied at the moment and press shortly the
PTT or TX key while watching the output power and the SWR readings. If the power or SWR at the
transceiver output are too high (over 5W or SWR over 2:1) release the key and check for the reason as
follows:
- check again whether the power control is set at minimum;
- check whether the frequency is within the operating range of the selected antenna;