Siel EXC-GT Series, Руководство пользователя и по обслуживанию

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EXC-GT – FM super-compact transmitter series
User’s manual – Page 27 of 98
8.1.h Changing from stand-by to full operation
The transmitter is thus programmed with the basic parameters. You can now return to the default screen by pressing the ESCAPE
button. Of course, you may now need to adjust other parameters, according to your requirements (e.g., modulation of the auxiliary
RDS/SCA signal (
2
10.2.c). For further information regarding the parameters that can be set, refer to Chap. 10.
Once you are sure that you’ve correctly programmed all the parameters, you can place the transceiver in full operation by pressing
the
ON/STAND-BY button. Ensure that the ON LED is lit up in green.
,
If the red ALARM indicator light appears, this means that an alarm event has occurred. When this happens, check the
type of alarm on the display, refer to the error table in section 12.1, and resolve the problem.
8.1.i Checking parameters
We recommend that all the operating parameters be verified the first time that the transceiver is placed in full operation, via the
VIEW
menu. To access this menu from the default screen:
54) Turn the knob to select the main
VIEW
menu, then press to confirm.
55) The page composing the
VIEW
menu will appear:
56) Refer to section 10.2 and verify that all parameters are correct, in particular:
o
Direct and reflected power, via the STATUS sub-menu (
2
10.2.a).
o
Modulation, via the L/R and MPX GRAPH sub-menus (
2
10.2.b).
o
Operating frequency, mono/stereo mode, and preemphasis, via the SYSTEM sub-menu (
2
10.2.e).
o
Internal temperatures, via the TEMPERAT. sub-menu (
2
10.2.g).
In addition, a spectrum analysis must be performed to ensure that no spurious emissions are generated due to internal or external
reasons (e.g., inverse intermodulation in the final stage).
,
If the reflected power exceeds 10% of the direct power, you will not be able to increase the output power beyond a
certain value due to an excessive SWR (standing wave ratio). Where this occurs, the antenna system must be checked
with a view to minimizing the reflected power.
,
If the red ALARM indicator light appears, this means that an alarm event has occurred. When this happens, check the
type of alarm on the display, refer to the error table in section 12.1, and resolve the problem.
While in normal operation, we recommend that you leave your device on the
STATUS
sub-menu, found under the main
VIEW
menu (
2
10.2.e).
If you leave the device in the main
SETUP
menu, after a period, the timer will automatically select the
STATUS
sub-menu under
the main
VIEW
menu in order to avoid programming accidental settings.
Siel hopes you enjoy working with your device, and would like to remind you that they are always available for further information or
to resolve specific problems.
8.1.j Changing from full operation to stand-by and vice-versa
During normal operation, you can place the transmitter in stand-by by pressing the ON/STAND-BY button. The device is on stand-by