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Rapco type 900
High-reliability multi-output Frequency Distribution system
Click here for
datasheet of 900 Series 
TYPICAL FRONT VIEW 900 series
 | UP TO 30 CHANNELS AVAILABLE FROM EACH RACK. (CASCADEABLE) |
| ULTRA LOW NOISE AND EMC PROFILE. |
| FLEXIBLE CONFIGURATION AND MOUNTING ARRANGEMENTS. |
| WIDE RANGE OF MODULES AVAILABLE. |
The 900 series is a range of high-reliability
modules which are used to build versatile frequency distribution systems.
The use of linear Power Supplies, enclosed module construction and
co-axial cable for interconnections means that the units have excellent
noise, emissions and immunity characteristics. Versions of the sub-rack
are available for 19" rack, desk top or wall mounting.
Typical applications are in installations where 'round the clock'
reliability is a must. Examples include manufacturing plants for items
such as mobile communications equipment and cellular base stations, both
military and commercial. More generally the 900 series has applications in
development laboratories, support workshops and calibration areas. 900
series units can also be found in many satellite ground stations, running
up/down links from the Poles to the Tropics.
The most widely used configuration of the 900 system is
fitted with:
1 x 911C Power Module
1 X 910D Input module
plus a number of 909 Output Modules (up to 5)
This arrangement provides up to 30 individually
buffered outputs at +13dBm (1V rms in 50ohm) from one 3U-high cabinet that
can be rack-mounted or installed on a shelf or wall bracket in the
vicinity of the destination loads. Input, from a suitable reference
source, in the frequency range 1MHz to 10MHz, is via an N-type connector,
chosen for its compatibility with a variety of 'low-loss trunk' cables
used for frequency distribution in large buildings. Signal levels from the
source are normally in the range +7 to +13 dBm (½ to 1Vrms) but levels as
low as 0dBm can be accommodated by gain adjustment in the 910 Input
module. The unit is locally powered from 220/230/240V 50Hz supplies, and
imposes a load of less than 70 VA. Local distribution over distances of up
to 50metres is usually cabled with high quality double-shielded co-ax,
such as RG400, to ensure minimum noise pick-up.
These are:
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| 909 |
6 output sinewave module (+13dBm in 50ohm maxm. output) |
| 919 |
3 output sinewave module with 3Vrms (+22.5dBm in 50ohm) output capability |
| 916 |
6 output sinewave synthesiser module (+13dBm in 50ohm
maxm. output)
/ internal switch selection of up to 250 popular frequencies. |
| 920 |
6 output sinewave frequency-doubler module (5MHz to 10MHz only) |
| 908 |
Dual-channel Phase-comparison module with dc output.
/ for data logging of Phase variations between two frequency sources |
| 980 |
Auto-Changeover Module
/ for auto, manual or remote selection between two input frequency sources |
ADDITIONS TO 900
SERIES FOR 2004/2005
903A – G703 DISTRIBUTION MODULE
Sine or TTL input on SMA connector
6 outputs G703.10 compliant. BNC 75 ohm connector
912A – TTL DISTRIBUTION MODULE
Sine or TTL input on SMA connector
6 outputs TTL 50 ohm on BNC connector
929A – TIMECODE TO FIBRE MODULE
IRIG-A or B timecode input on SMA connector
Fibre Optic output on SM Opto connector
930A – UNIVERSAL FIBRE TRANSCEIVER MODULE
2x inputs of IRIG, Timecode, NMEA, Logic or Rapco Opto
2x outputs of logic and Opto
900 SERIES MODULES -- Outline
specifications
General
All 900 series modules are built in fully enclosed 12HP
X 3U DIN housings and are compatible with the 900 cage POWER SUPPLY MODULE
(911C). Input frequency reference is provided, where required, from the
INPUT CONDITIONING/SPLITTER MODULE (910D).
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909B -- STANDARD SINEWAVE OUTPUT MODULE / 1MHz to 10MHz
909E -- TIMECODE OUTPUT MODULE
1 x Input, SMA (from 910D Cage Input conditioning/Splitter module)
6 Outputs, BNC (+13dBm in 50ohm maxm. recommended)
All outputs monitored for low-signal state; individual Indicators. Front-panel alarm-threshold adjust.
Collective alarm output to Cage-alarm logic in 911 Power unit
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FRONT |
REAR
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919A -- HI-LEVEL SINEWAVE OUTPUT MODULE / 1MHz to 10MHz
1 x Input, SMA (from 910D Cage Input conditioning/Splitter module)
3 Outputs, BNC (+22.5dBm in 50ohm maxm. recommended), TNC connector option.
Separate level control for each output; front-panel adjust.
All outputs monitored for low-signal state; individual Indicators. front-panel alarm-threshold adjust.
Collective alarm output to Cage-alarm logic in 911 Power unit
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916A -- DIRECT DIGITAL SYNTHESISER SINEWAVE OUTPUT MODULE / VLF to 10MHz
1 x Input, SMA (from 910D Cage Input-conditioning/Splitter module)
6 Outputs, BNC (+13dBm in 50ohm maxm. recommended)
Up to 250 frequencies available via internal DIL switch.
User-defined frequencies available. 10 digit ( = 10millihertz) setting resolution.
Frequency accuracy matches input source, digitally locked. Front-panel lock-status indicator.
Low harmonic and low spurious content in output spectrum
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920B --5MHz TO 10 MHz FREQUENCY-DOUBLER SINEWAVE OUTPUT MODULE.
1 x Input, SMA (from 910D Cage Input conditioning/Splitter module)
6 Outputs, BNC (+13dBm in 50ohm maxm. recommended)
Collective level control for all outputs; front-panel adjust.
All outputs monitored for low-signal state. Individual Indicators. front-panel alarm-threshold adjust.
Collective alarm output to Cage-alarm logic in 911 Power unit.
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910D -- INPUT CONDITIONING / SPLITTER MODULE -- 1MHz to 10MHz
1 x Input, N-Type (from cage input frequency-reference source)
6 Outputs, SMA (Signal split to five output modules, 1 spare for local cascade connection)
Collective output level adjustment on front-panel;
Gain range sufficient for operation with <0dBm to >+13dBm input.
Input level and Output level fault indicators, with alarm threshold adjustment on front panel.
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911D -- POWER SUPPLY MODULE -- 220V/230V/240V
ac rms INPUT, +/-14Vdc output
911E -- POWER SUPPLY MODULE -- 110V/115V/120V
ac rms INPUT, +/-14Vdc output
ac input via IEC connector. / LSF Power lead provided
dc output via ribbon connector +/- 14V nominal at up to 1A
Internal +ve and -ve dc rails, monitored for low voltage. Front-panel indicator.
Module alarm signal input via power ribbon cable from all cage modules
Cage alarm relay, voltage-free contacts on isolated BNC connector
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980A – RF AUTO-CHANGEOVER MODULE
with Remote / Manual override
980B – TIMECODE AUTO-CHANGEOVER MODULE with Remote
/ Manual override
980C – 1PPS AUTO-CHANGEOVER MODULE with Remote /
Manual override
2 x signal inputs, BNC, from Master and Standby sources, 1 x output , BNC
Both sources monitored for signal level failure.
Status and Source-in-use indicators on front panel.
Buffered front-panel monitor sockets, BNC, for Master and Standby signals.
Front-panel rotary switch for manual override to Master or Standby
TTL remote control interface and status readout, 'D' connector
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908A -- PHASE COMPARATOR MODULE
Dual channel phase comparison, 2 x dc outputs, 0 to+1V fsd
3 x inputs, BNC, source A, source B, Reference
For single channel operation, Relative Phase A input versus Reference input
For dual-channel operation, Relative Phase, A input versus Reference input
and, Relative Phase B input versus Reference input
Rear-panel switch-selected input impedance Hi/50ohm all inputs
Reference Output, SMA, (to cascade reference to other modules) -- TTL/CMOS
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922 – RS422 DISTRIBUTION MODULE
1 x Input, BNC (Sinewave or TTL)
6 Outputs, BNO RS422 signalling
All outputs monitored for low-signal state; individual Indicators.
Front-panel alarm-threshold adjust.
Collective alarm output to Cage-alarm logic in 911 Power unit.
Models available:-
922A 1 – 10MHz
922B
Low frequency typically 1Hz
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ADDITIONS TO 900
SERIES FOR 2004/ 2005
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903A – G703 DISTRIBUTION MODULE
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Sine or TTL input on SMA connector
6 outputs G703.10 compliant. BNC 75 ohm connector
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FRONT |
REAR
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912A – TTL DISTRIBUTION MODULE
Sine or TTL input on SMA connector
6 outputs TTL 50 ohm on BNC connector
929A – TIMECODE TO FIBRE MODULE
IRIG-A or B timecode input on SMA connector
Fibre Optic output on SM Opto connector
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930A – UNIVERSAL FIBRE TRANSCEIVER MODULE
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2x inputs of IRIG, Timecode, NMEA, Logic or Rapco Opto
2x outputs of logic and Opto
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FRONT |
REAR
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Click here for
datasheet of 900 Series
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