Sierra Video 321V User Manual

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

INSTRUCTION MANUAL

1

Contents

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

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

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

Audio connector pin listings, Table 1.......................................... Page 4

Circuit description, Model 321V................................................. Page 5

Circuit description, Model 324V................................................. Page 6

Circuit description, Model 321S ................................................. Page 7

Circuit description, control panel................................................ Page 8

Serial control protocol................................................................. Page 8

DOS control program................................................................ Page 11

Parts list, 503101....................................................................... Page 12

Parts list, 503130....................................................................... Page 13

Parts list, 503105....................................................................... Page 14

Parts list, 803104....................................................................... Page 15

Schematic diagram, 503101 (4 pages) ..................................... Page 16

Schematic diagram, 503130....................................................... Page 20

Schematic diagram, 503105 ...................................................... Page 21

Schematic diagram, 803104 ...................................................... Page 22

Schematic diagram, 503130 (2 pages) ..................................... Page 23

Component locations, 503105................................................... Page 24

Component locations, 503101................................................... Page 25

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

Warranty registration card....................................................... Attached

2

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

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 5MHz to 20 MHz

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

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........................................................ 14 ns

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

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

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

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....................."D" miniature per Table 1

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.......................................... DB9M to DB9M

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..................................15 VA (321V & 321S)

Power req............................................... 25 VA (324V)

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

Specifications

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

INSTRUCTION MANUAL

3

Model 321V 32 by 1 video routing switcher
Model 324V 32 by 4 video routing switcher
Model 321S 32 by 1 stereo audio routing switcher

General description

The SVS Model 321V, 321S and 324V are a
family of small routing switchers with 32 inputs.
Optional local and / or remote panels are simple to
operate, button-per-crosspoint designs. The
electronics for each of these routers is contained
in a 1.75" high EIA standard 1 RU rack mount­able frame. All the circuitry is on a single plug-in
circuit board.

The Model 321V includes built in RS232 serial
control. In addition to the optional remote control
panel, the Model 321V can accept an optional
local control panel in place of the blank front cover.

The Model 324V is a four bus version of the
Model 321V. For the Model 324V RS232 serial
control is an option that is built in at the factory.
The Model 324V accepts four separate 32 by 1
remote control panels.

The Model 321S can be used in either an AFV
configuration, when connected to a Model 321V
or Model 324V, or it can be used as a standalone
32 by 1 stereo audio router.

Installation

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

The Model 321V, 321S and 324V produce almost
no heat, so they can be mounted next to other
equipment without the need to allow space for
cooling. Its shallow depth (8.5") allows the space
behind the Model 32 to aid in the cooling of deeper
heat producing equipment above or below it.

Power supply

Power is provided by an external outlet mounted
transformer (117VAC 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 32
labeled “PWR.”

Video connections

The 32 video input BNC connectors each have an
internal 75 ohm 1% termination. Unused inputs
can be left with no connection. The Model 321V
has two identical outputs. An unused output does
not need to be terminated.

Sync connection (Model 324V only)

The Model 324V has two looped BNC connectors
labled SYNC. These may be connected to house
sync, a reference video or looped from one of the
Model 324 four outputs. If left unconnected the
Model 324V will switch at a random point rather
than in the vertical interval.

Audio connections

Audio connections on the rear of the Model 321S
are made via “D” miniature connectors. Four 25
pin connectors are used for inputs on each channel
(eight audio inputs per connector). The Model
321S has two sets of outputs (two outputs for the
right channel and two outputs for the left channel).
The pinout of all the audio connectors is shown
in Table 1.

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

INSTRUCTION MANUAL

INPUTS 1-8
PIN FUNCTION

1 INPUT 1-

14 INPUT 1+

2 GROUND

15 INPUT 2-

3 INPUT 2+

16 GROUND

4 INPUT 3-

17 INPUT 3+

5 GROUND

18 INPUT 4-

6 INPUT 4+

19 GROUND

7 GROUND

20 GROUND

8 INPUT 5-

21 INPUT 5+

9 GROUND

22 INPUT 6-

10 INPUT 6+

23 GROUND

11 INPUT 7-

24 INPUT 7+

12 GROUND

25 INPUT 8-

13 INPUT 8+

INPUTS 9-16
PIN FUNCTION

1 INPUT 9-

14 INPUT 9+

2 GROUND

15 INPUT 10-

3 INPUT 10+

16 GROUND

4 INPUT 11-

17 INPUT 11+

5 GROUND

18 INPUT 12-

6 INPUT 12+

19 GROUND

7 GROUND

20 GROUND

8 INPUT 13-

21 INPUT 13+

9 GROUND

22 INPUT 14-

10 INPUT 14+

23 GROUND

11 INPUT 15-

24 INPUT 15+

12 GROUND

25 INPUT 16-

13 INPUT 16+

INPUTS 17-24
PIN FUNCTION

1 INPUT 17-

14 INPUT 17+

2 GROUND

15 INPUT 18-

3 INPUT 18+

16 GROUND

4 INPUT 19-

17 INPUT 19+

5 GROUND

18 INPUT 20-

6 INPUT 20+

19 GROUND

7 GROUND

20 GROUND

8 INPUT 21-

21 INPUT 21+

9 GROUND

22 INPUT 22-

10 INPUT 22+

23 GROUND

11 INPUT 23-

24 INPUT 23+

12 GROUND

25 INPUT 24-

13 INPUT 24+

INPUTS 25-32
PIN FUNCTION

1 INPUT 25-

14 INPUT 25+

2 GROUND

15 INPUT 26-

3 INPUT 26+

16 GROUND

4 INPUT 27-

17 INPUT 27+

5 GROUND

18 INPUT 28-

6 INPUT 28+

19 GROUND

7 GROUND

20 GROUND

8 INPUT 29-

21 INPUT 29+

9 GROUND

22 INPUT 30-

10 INPUT 30+

23 GROUND

11 INPUT 31-

24 INPUT 31+

12 GROUND

25 INPUT 32-

13 INPUT 32+

Table 1a Model 32S audio input connections (typical of both channels)

Note: 25 pin D miniature to terminal strip adaptors are available from SVS. For more information,
contact your dealer or call Sierra Video Systems.

Table 1b Model 32S audio output connections

PIN FUNCTION

1 RIGHT OUT -

6 LEFT OUT -

2 RIGHT OUT +

7 LEFT OUT +

3 GROUND

8 LEFT OUT +

4 RIGHT OUT +

9 LEFT OUT -

5 RIGHT OUT -

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

INSTRUCTION MANUAL

5

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

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

Control panels

If the local control panel for the Model 321V is
ordered at the same time as the router, the panel is
installed at the factory in place of the front cover.
If the local control panel is added later, begin its
installation by first removing the front cover,
which is held at each end by magnets attached to
the rack frame mounting angles at each end of the
frame. The optional local control panel includes
two ribbon cables which mate with two headers
on the front edge of the Model 32V electronics.
The ends of the cables are labeled “LAMPS” and
“SWITCHES”. The LAMP cable mates with the
header on the left.

The optional remote control panel, if ordered, is a
separate 1 3/4" high rack mount unit plus separate
interconnect cable. After mounting the remote
panel at the desired location, connect one end of
the cable to the connector labeled “CONTROL
PANEL” at the rear of the Model 321V, 321S or
324V frame. The Model 321S has two connectors
labeled “CONTROL PANEL OR AFV”. Either
connector can be used. Connect the other end of
the cable to the connector on the rear of the
remote panel.

If a Model 321S is ordered with a Model 321V or
Model 324V, SVS provides a short cable to tie
one of the connectors behind the Model 321S to
the video router.

Serial control

The Model 321V has built-in RS232 serial
control. Connection is made to a male 3 pin mini­“XLR” connector on the rear of the Model 321V
(a mating connector is supplied with the unit). The
pinout of this connector is as follows:

Pin Function
1 Transmit output of 32V to your SIA input
2 Ground
3 Receive input of 32V to your SIA output

The Model 324V has optional built-in RS232
serial control. Connection is made to a female 9
pin D miniature connector on the rear of the
Model 324V. The pinout of this connector is as
follows:

Pin Function
2 Receive input of 32V to your SIA output
1 Ground
8 Transmit output of 32V to your SIA input

Model 321V Circuit Description

The electronics for the Model 321V are all on a
single plug-in module, the 503101. Refer to the
schematic diagram while reading the following
circuit description. The drawing is divided into 2
pages by circuit function. The following text is
organized the same way.

Video circuits (sheet 1 of 2 of the schematic
diagram). The 503101 video bus is made of 32
discrete video crosspoint circuits. The same
component designators and values are used for all
32 crosspoints. Only one crosspoint is described
here. Video input 1 enters the 503101 on edge
connector J1 pin 4. From there it is AC coupled
through C1. C1 protects the circuitry of the
503135 from possible damage if the incoming
video signal were to have an excessive DC
component on it. R1, after C1, provides a +0.7V
reference to the AC coupled signal. The video
crosspoint which follows is a “T” circuit configu­ration. When a crosspoint is off, the two transistors
in the signal path are both off and the diode
between them is on. This provides very high