Knox Video RS4x4HB - Manual (Page 3)

KNOX VIDEO
RS4x4HB ROUTING SWITCHER KNOX VIDEO
RS4x4HB ROUTING SWITCHER
Page 1 Page 2
SECTION 1. GENERAL INFORMATION
1.1 INTRODUCTION
The RS4x4HB routing switcher is a device which accepts up to four video
inputs and up to four stereo audio inputs (that is, four channels of left and right
audio), and connects any one of the input channels (buffered electrically) to one or
more of the four outputs.
1.2 TECHNICAL DESCRIPTION
The RS4x4HB uses a single chip microprocessor with backup battery to drive
two monolithic latching crosspoint decoders, one for video and one for each channel
of audio. The video channel features a driver stage with a gain of two to drive a 75
ohm coaxial line. The audio is set up for high impedance unbalanced inputs and
outputs with a gain of one, or optional 600 ~ balanced inputs and outputs at up to
+16dB.
Crosspoint information is collected by the microprocessor from either the front
panel push-button switches or from the RS232 port on the rear panel, and distributed
to the crosspoint decoders. Audio and video may be routed together or separately.
The microprocessor program activates an automatic lamp test at powerup or when
requested on the RS232 port. Each time a routing command is received, the current
routing map can be reported on the RS232 port.
1.3 DETAIL SPECIFICATIONS
Video Channels:
Levels: 1 v. composite picture video or black burst: with a variety of
line resolutions including 525,625,825,875, and 1025, with a
variety of television systems including NTSC, PAL, SECAM,
and others.
Frequency Response: DC to 200MHz
@ 300mv, <-3dB @ 150MHz
@ 1.0v,<-3dB@ 115MHz
Input Impedance: 75 ohm
Output Impedance: 75 ohm
Crosstalk: all hostile:
Typ <-70dB @ 5MHz
Typ <-55dB @ 20MHz
Typ <-25dB @ 100MHz
one hostile:
<-40dB @ 200 MHz
Audio Channels, Unbalanced
Levels: 2 v. unbalanced audio, including
voice, music, PCM, control track,
SM PTE time code, and others
Frequency Response: 20Hz to 30KHz
Input Impedance: l00Kohm
Output Impedance: 1Kohm
Crosstalk: less than -85db @ 1KHz
Audio Channels, Balanced
Hum and noise: <-90dB
Frequency Response: 20Hz to 50K ±1/4 dB
Level: 0, 4, or 16dB, clipping at 18dB
Impedance: Bridging, or 600 ohms termination
Crosstalk: <-90dB @ 20KHz
General
Connectors-Video: (8) BNC or RCA (if specified)
Connectors-Audio: Unbalanced: (16) RCA
Balanced: Phoenix screwtype,
removable
Power Consumption: nominal 15 vdc, .75A (from plug-in
module supplied)
Power Connector: 5mm/2mm coaxial
Dimensions: 2U rack
19" wide x 3.5" high x 2" deep
Shipping Weight: 5 pounds