Tait T850 II Series, Service Manual

Page: 139 / 370

M850-00
T856/857 General Information C1.15
Copyright TEL 31/09/98
1.5 T857 Standard Product Range
The following table lists the range of standard T857 types (i.e. no options fitted and
cyclic keying disabled) available at the time this manual was published. Consult your
nearest Tait Dealer or Customer Service Organisation for more information.
Caution:
T857-16-XXXX Product Types
In the United States the 406 to 406.1MHz frequency range is reserved
for use by Distress Beacons.
Do not
program exciters to operate in this
frequency range in the United States.
You can identify the exciter type by checking the product code printed on a label on the
rear of the chassis (Figure 1.1 in Part A shows typical labels). You can further verify the
exciter type by checking the placement of an SMD resistor in the table that is screen
printed onto the PCB (refer to Section 6.1 for more details).
Frequency Range (MHz) 400-440
Deviation (kHz) 2.5 2.5 4 5
TCXO ±1ppm -20°C to +60°C
• • • •
Exciter Type: T857- 16-0000
a
a. United States market only.
15-0000 13-0000 10-0000
Frequency Range (MHz) 440-480
Deviation (kHz) 2.5 2.5 4 5
TCXO ±1ppm -20°C to +60°C
• • • •
Exciter Type: T857- 26-0000
a
25-0000 23-0000 20-0000
Frequency Range (MHz) 480-512 480-520
Deviation 2.5 2.5 5
TXCO ±1ppm -20° to +60°C
• • •
Exciter Type: T857- 36-0000
a
35-0000 30-0000