Table of Contents
Advertisement
EB200 Manual
Operation
3.9.4 Relationship between the FRQ, MEM, SEL and LOCK keys
FRQ and MEM are selection keys with permanently assigned parameters. Their function does not
depend on the menu status.
The SEL key is an alternative to the FRQ and MEM keys
Example:
If FRQ is pressed in a configuration menu, the selection of the current parameter is overridden and it
becomes possible to tune the receive frequency with the spinwheel. When the SEL key is pressed,
selection is switched back to the previous configuration parameter.
In every case, the LOCK key disables the spinwheel. The LOCK state does not have any influence on
the SEL function.
3.10 TEST key
The "short test" is run while the key is held down.
During the "short test" an amplitude modulated line spectrum (64-MHz grid) is fed-in behind the antenna
input and the receiver is tuned to the line frequency which is the closest to the current receive
frequency. Then the complete receive-path from the antenna input of the tuner is measured up to the
AF-processing and weighted.
If all data are within the permissible limits, the message "TEST OK SIGNAL PATH" is output. If the
measured level is not in the expected range, the message "SENSITIVITY OUT OF RANGE" is output.
3.11 ON/OFF switch
The toggle switch turns the operating voltage to the EB200, which is generated by a DC/DC converter,
on or off.
The backlit LCD indicates when the EB200 is ON.
The selected parameters are stored.
3.12 Contrast control
The contrast control is used to set the vertical reading angle for the LCD display, to adapt it to the
workplace and to compensate for the temperature dependence of the LCD. This function cannot be
altered from the menus.
3.13 VAR pot (MGC, SQU, TONE)
The digital potentiometer which has 24 switch positions per turn is used to vary the MGC, the squelch
threshold and the tone values. The value in inverse video is the one that can be varied with the pot.
4052.2000.02
3.19
E-7
Advertisement
Table of Contents
Troubleshooting
