Service manual

Page 18
SVR-250 Service Manual
Common Data
File Name: 15 character name for this profile stored
in E²PROM.
Number of Channels: Select 1-20 channels
Model: Select either simplex or Duplex. Duplex
operation requires hardware and firmware changes
and is not field upgradable.
Band: Select the frequency band to match your
SVR-250. Changing bands resets all data to default
values (confirmation req.)
COR Polarity: Determines if the COR signal from
the mobile is active high or low.
On-Air Polarity: Determines if the Tx indication
from the mobile is active high or low.
Mobile Type: Select either Conventional, Trunking
or MSV Satellite. If Trunking or MSV is selected,
the SVR-250 will go through the voice channel
acquisition procedure during portable-to-base repeat
mode.
Tx Audio: If the mobile Tx audio from the SVR-250 to the mobile is connected after pre-emphasis, select Flat
response. If connected before pre-emphasis or to the mic input, select De-Emp.
Rx Audio: If the Rx audio from the mobile to the SVR-250 is connected to the discriminator or before
de-emphasis, select Flat response. If connected after de-emphasis, select Pre-Emp.
Power Up Channel: Select either Last Channel or Home Channel.
Local Mic Repeat: Enables or disables the local mic repeat function; if enabled, ensure the on-air polarity is set
correctly and the Grey wire or J5 is configured correctly (see pages 8 & 9).
ARS-250: Check this box only if the ARS-250 Auxiliary receiver is installed. The ARS-250 is used by non-priority
units to sense mobile transmitters in half-duplex systems.
Outputs: The SVR-250 has 4 general purpose outputs that can be programmed to follow the channel selector and
output chan 1-4 (Single Output) or chan 1-15 (Binary Output), or Repeater Functions for Priority, Transmit and
PL Decode. The outputs are open collector and active low. The outputs can also be disabled in software (None).
Priority Sampling: If the SVR-250 is used in a multi-vehicle environment, priority sampling must be enabled for
proper operation.
Sampling Rate: If Priority sampling is enabled, this selects the sampling interval. Range is 0.25 seconds to 2.5
seconds in .25 sec increments. The higher this setting, the longer the handheld operator must wait before speaking
after pressing PTT during base-to-portable sampling.
Time Out Timer: This is the maximum duration of a single base to portable transmission that will be allowed.
Emergency Format: Emg Out Only will assert pin 10 of the main connector for as long as secondary tone is
decoded. Emg Out with voice will assert pin 10 but also repeat portable-to-base mode.
Priority Format: The SVR-250 has an enhanced signalling format to determine if the priority vehicle has left the
scene during idle time. Select SVR-200 legacy to turn off this feature. Both formats are fully SVR-200 compatible.