Sierra Video 44VSCP User Manual

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Sierra Video Systems • P.O. Box 2462 • Grass Valley, CA 95945 • [phone] • Fax [phone]

MODEL 44 INSTRUCTION MANUAL

Specifications .............................................................................. Page 2

General description ..................................................................... Page 3

Installation................................................................................... Page 3

Control panel operation............................................................... Page 4

Circuit description, plug-in circuit modules 503143 & 503146.. Page 4

Circuit description, plug-in circuit module 503160 .................... Page 6

Circuit description, control panel 503151................................... Page 6

Serial control protocol................................................................. Page 7

DOS control program, RTRCTRL.............................................. Page 9

MacRoute .................................................................................... Page 9

Parts list, 503146....................................................................... Page 10

Parts list, 503143....................................................................... Page 11

Parts list, 503160....................................................................... Page 12

Parts list, 503151....................................................................... Page 13

Schematic diagram, 503146 (3 pages) ...................................... Page 14

Schematic diagram, 503143 (2 pages) ...................................... Page 17

Schematic diagram, 503160 (3 pages) ...................................... Page 19

Schematic diagram, 503151 ...................................................... Page 22

Component locations, 503146................................................... Page 23

Component locations, 503143................................................... Page 24

Component loacations, 503160................................................. Page 25

RTRCTL and MacRoute diskettes ................................ Attached( IRC)

Warranty registration card............................................. Attached( IRC)

Warranty statement................................................................Rear cover

Contents

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Sierra Video Systems • P.O. Box 2462 • Grass Valley, CA 95945 • [phone] • Fax [phone]

MODEL 44 INSTRUCTION MANUAL

Video input characteristics

Nominal video level........................................... 1V p-p

Maximum video level..................................... 1.5V p-p

Impedance............................................................. 75 Ω

Return loss .......................................... 40 dB @ 5 MHz

Superimposed DC.............................................. +/- 5 V

Connector type...................................................... BNC

Video output characteristics

Nominal video level........................................... 1V p-p

Maximum video level..................................... 1.5V p-p

Impedance............................................................. 75 Ω

Return loss .......................................... 35 dB @ 5 MHz

DC on signal .................................................+/- 50 mV

Connector type...................................................... BNC

Video system performance

Nominal gain ....................................................... Unity

Gain adjustment range ...................................... +/- 2dB

Frequency response .......................+/- 0.1dB to 5 MHz

...........................................+0 -1 dB 5 MHz to 20 MHz

.........................................+0 -3 dB 20 MHz to 40 MHz

.............. +0 -3 dB 20 MHz to 200 MHz (44CPW only)

Diff phase .............. 0.1 deg @ 3.58 MHz or 4.43 MHz

Diff gain....................0.1 % @ 3.58 MHz or 4.43 MHz

Crosstalk .........................60 dB @ 5 MHz (all hostile)

...........................40 dB @ 40 MHz (bracketed hostiles)

S/N .......................................................80 dB to 5 MHz

System delay..............................20 ns (44VS and 44C)

System delay.................................10 ns (44CPW only)

Input timing variation ....................................... +/- 1 ns

Switching point.................. first line after vertical sync

Vertical rate ..............................................25 to 200 Hz

Specifications

Audio input characteristics

Nominal input level ..........................+8 dBm @ 600 Ω

Maximum input level......................+18 dBm @ 600 Ω

Source impedance............................................... 600 Ω

Input impedance .................................................30 KΩ

Common mode rejection ......................40 dB @ 60 Hz

Connector type........................................Terminal strip

Audio output characteristics

Nominal output level ........................+8 dBm @ 600 Ω

Maximum output level....................+18 dBm @ 600 Ω

Source impedance............................................... 600 Ω

Load impedance.................................................. 600 Ω

Audio system performance

Frequency response ................20 to 20 KHz +/- 0.1 dB

Bandwidth....................................................... 100 KHz

S/N .........................105 dB ref +18 dBm 20 to 20 KHz

Crosstalk ........................ 80 dB @ 15 KHz (all hostile)

IM and TDH ......... 0.05 % to + 18 dBm 20 to 20 KHz

Optional control panel

Cable type ...................................... DB25M to DB25M

Maximum length...................................... 200 ft / 60 M

Mechanical characteristics

Frame depth ............................................8.5" / 21.6 cm

Operating temperature range ....................0 - 40 deg C

Input voltage .................. 117 VAC +/- 10 % 57-63 Hz

....................................or 230 VAC +/- 10% 47 - 63 Hz

Power req............................................................20 VA

Weight ...................................................10 lbs / 4.5 Kg

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Sierra Video Systems • P.O. Box 2462 • Grass Valley, CA 95945 • [phone] • Fax [phone]

MODEL 44 INSTRUCTION MANUAL

General description

The Model 44 is a four input by four output video
plus stereo audio routing system.

The Model 44C is a four input, four output by three
channel (RGB or YUV) component video router.

The Model 44CPW is a four input, four output by
four channel (RGB plus Sync) 200 MHz compo­nent video router.

All three models are described in this instruction
manual. The routers include RS-232 serial con­trol. The ASCII protocol used is compatible with
the protocol used in all other SVS routers. The
Model 44’s can be configured with a variety of
control methods:

• Local front panel pushbutton control with 16 re­legendable LED illuminated switches.

• Remote control panel pushbuttons with 16 re­legendable LED illuminated switches, including
15M interconnect cable. Cables up to 150M are
available.

The electronics for the SVS Model 44’s are
contained in a 1.75" high EIA standard 1RU high
rack mountable frame. All the circuitry is on a
single plug-in circuit board.

Installation

Carefully unpack the system. If any damage to the
unit is observed, immediately contact both the
shipping company and SVS.

The Model 44’s produce almost no heat, so they
can be mounted next to other equipment without
the need to allow space for cooling. Their shallow
depth (8.5") allows the space behind the Model
44’s to aid in the cooling of deeper heat producing
equipment above or below it.

The Model 44 is intended to be mounted in a
standard 19" metal equipment rack.

Power supply

Power for the Model 44’s is provided by an
external outlet mounted transformer (115VAC
version only). For 220VAC units the external
transformer has a short input cable to which the
proper AC input connector must be added. The
output of the transformer is a 2M (6ft) cable with
a 3 pin female DIN connector. This mates with
the corresponding 3 pin male DIN connector on
the rear of the Model 44 labeled “PWR.”

Audio connections

Audio connections on the rear of the Model 44 are
made via terminal strips. Each input and output
signal consists of 3 connections: +, -, and G for
ground. The terminal strip design is a type that
directly accepts the stripped end of a wire without
attaching any type of lug to the end of the wire.
When using stranded wire it is easier to handle the
wire if the stripped end is tinned to prevent stray
strands from touching other wires.

If the audio source is unbalanced (one wire with a
shield), connect the single wire to the “+” terminal
and the shield to the “G” terminal. Leave the “-”
terminal open.

If the audio source is balanced with no shield,
connect the two wires to the “+” and “-” terminal
and leave the “G” terminal open.

Video connections

The Model 44VS and Model 44C routers have
“looping” video inputs. This means there are two
BNC connectors associated with each input.
Connect your source video to either BNC. The
second BNC associated with each used input must
either be terminated behind the Model 44 with a
75 ohm termination or the signal which appears
on this parallel connector continued on to a device
which is terminated with 75 ohms.

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Sierra Video Systems • P.O. Box 2462 • Grass Valley, CA 95945 • [phone] • Fax [phone]

MODEL 44 INSTRUCTION MANUAL

Control panel operation.

The local and / or remote control panel has sixteen
momentary switches. The switch labeling is the
numbers 1 through 4 repeated four times. The first
four switches select the input for output one. The
second four switches select the input for output
two and so on. All four outputs can select differ­ent inputs or the same input can be selected on
multiple outputs with no ill effect.

CIRCUIT DESCRIPTIONS
Model 44VS and 44C.

The electronics for these models are all on a
single plug in module. The module for the Model
44VS is part number 503146 and the part number
for the Model 44C is 503143. The video circuit
repeats three times on the 503143. The same
circuit occurs only once in the 503146. The
503143 schematic diagram sheet 1 delineates this
circuit for both modules. Similarly the control
circuits which are the same on both modules are
delineated on page 2 of the 503143 diagram. The
audio circuits which are unique to the 503146
module are shown on the 503146 diagram.

Video circuits. Each video input is AC coupled to
a wideband buffer (U1). The output of U1 drives
four crosspoint IC (U2), one for each of the four
buses in the Model 44. U2 is a four input by one
output crosspoint. U2 includes a two line to four
line control decoder.

The output of each four by one crosspoint bus is
connected to an identical output amplifier, U3. U3
is a 50MHz wide band video amplifier with a very
low output impedance (about 0.1 ohms). R10 in
conjunction with R19 plus variable resistor VR1 sets
the gain of the entire Model 44 to 2X. R11 raises
the output impedance to 75 ohms required to
interface to external 75 ohm coax cable environment.

The Model 44CPW has internal terminations. This
means that there is only one BNC connector for
each input.

The Model 44 video outputs are intended to drive
75 ohm terminated lines. Unused outputs do not
need to be terminated.

Control panels.

The local control panel, if ordered with the unit,
will be installed at the factory in place of the
blank front cover. If it is installed later, remove
the blank cover, connect one end of the short
ribbon cable to the mating connector on the front
edge of the Model 44 circuit board. Attach the
other end of the ribbon cable to the connector on
the rear of the control panel. Being careful not to
pinch the ribbon cable, slide the local control panel
between the top and bottom cover until it stops
against the two magnets at each end of the frame.

The remote control panel if ordered is a separate

1.75" high rack mount unit plus separate intercon­nect cable. After mounting the remote panel at the
desired location connect one end on the cable to
the connector labeled “REMOTE CONTROL” at
the rear of the Model 44 frame. Connect the other
end to the connector on the rear of the remote
panel.

Serial control.

The Model 44’s include built in RS-232 serial
control. Connection is made to a female 9 pin “D”
miniature connector on the rear of the Model 44
as follows:

Pin Function
1 Ground
2 Receive input
8 Transmit output