Operating instructions

GENERAL INFORMATION
1-17
Options and accessories
Options
Option 1
Option 2
Option 4
Option 5
Option 6
Option 8
Option 9
600 Ω Matching Unit
Analog Systems Card
Parallel Interface †
GPIB Interface †
Memory Card Drive and Date/Time Stamp
SSB Demodulator
Occupied Bandwidth
Option 10
Option 11
Option 12
Option 13
Option 14
Option 15
Option 16
NMT
AMPS
TACS
MPT1327
PMRTEST
EDACS Radio Test
EDACS Repeater Test
⎫
⎪
⎬
⎪
⎭
Require Option 2 to be fitted
Option 22
Option 23
Option 24
Option 25
Option 26
Option 29
Option 30
Option 31
POCSAG decode
CCITT Filter
‡
CMESS Filter
‡
Avionics
Tones Remote
Plus 2 Distortion Notch Filters board
Bail arm and front panel stowage cover
IF Output Capability
† Option 4 and Option 5 cannot both be fitted.
‡ Option 23 and Option 24 cannot both be fitted.
600 Ω Matching Unit (Option 1)
Features Switchable 600 Ω balanced AF input and output
Switchable 20 dB attenuator on AF generator output †
Input circuit
Impedance:
600 Ω
Return loss: >21 dB at 1 kHz
Frequency response: ±0.5 dB at 200 Hz to 5 kHz,
±2 dB at 100 Hz to 20 kHz
Accuracy of 1:1 input:output ratio: ±1% at 1 kHz ± accuracy of 2948B
Maximum input: 5 V RMS maximum at 200 Hz to 5 kHz,
3 V RMS maximum at 100 Hz to 20 kHz
Output circuit
Impedance:
600 Ω
Return loss:
>21 dB at 1 kHz
Frequency response:
±0.5 dB at 200 Hz to 5 kHz,
±2 dB at 100 Hz to 20 kHz
Level accuracy: ±2% at 1 kHz ± accuracy of 2948B
Output level:
1 mV to 2.5 V RMS across 600 Ω.
† The 20 dB attenuator facility reduces the AF output resolution to 0.01 mV up to 40 mV output level.
The accuracy of the output level degrades by ± 2 %
Analog Systems Card (Option 2) Required for Options 10 to 16.
For performance data refer to respective handbook supplement.