Page 56 of 77
SKIPPER Electronics AS
Edition: 2017-06-12
GDS102 Operation and Installation Manual
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Chapter: 4. Start-up and system Adaption
Frequency setup
The frequencies of both channels are preset in production. It is possible to change the settings. To do so,
it is necessary to set the required values on the DIP switches on the dual transceiver PCB, according to
table 4.3 and adjust the displaying value on screen 4 (soft key FREQUENCY) see “Fig. 2.5. Screen 4.
Transducer details.” on page 17. Note: Both must be adjusted, as adjusting just the indicated values
will not change the actual operating frequency.
• Channel 1 is optimized for frequencies 50 - 265 kHz. The required frequency must be set using
jumper SW3 on the transceiver PCB according to table 4.3. Note: The factory setting is 200 kHz.
• Channel 2 is optimized for frequencies 10 - 50 kHz. Required frequency must be set by jumper SW2
on the dual transceiver PCB according to table 4.3. Note: The factory setting is 50 kHz.
SW2 and SW3 are located in the upper right corner of the transceiver PCB, (see g. 4.2 below).
Transducers must be connected to the corresponding terminals.
T2
T1
TP7 TP8
DD2
Figure showing location of frequency selection
switches SW2, SW3 and lter bandwidth switch
SW1 on dual transceiver board (Dual XC).
Note: PCB on gure rotated 90 degrees.
SW2 - Ch 2: 10 - 50 kHz.
SW3 - Ch 1: 50 - 265 kHz.
Fig. 4.2. Frequency settings
Important
When doing service or repair, please wait two minutes after power o, before unplugging internal
connectors.
SW1 selects the lter bandwidth
according to the following values:
1 2 Bandwidth
O O 1 kHz
O On 2 kHz
On O 4 kHz (default value)
On On 8 kHz
ON
1
2
Fig. 4.3. SW1 bandwidth settings
SW1 - Filter bandwidth settings
Filter setup
Figure is showing default value for SW1.
(See g. 4.2 for location on PCB).
Important: Do not
change default value
before consulting Skipper.
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