Knox Video Chameleon256 Series - Manual (Page 7)

Audio Channels, Balanced
Frequency Response: DC to 50kHz, +/- 0.25dB up to 25dBu level
THD+N: less than 0.05 %, 20Hz to 20kHz,
0 to +25dBu level
IMD (SMPTE): less than 0.03 %, 20Hz to 20kHz, 0 to
+25dBu
Noise: less than -85dB, 20Hz to 20kHz
CMRR: greater than 60dB at 60Hz, 50dB
to 20kHz
Crosstalk: less than -80dB, 20Hz to 20kHz, 2 adjacent
channels driven
Input to Output Gain: Unity +/- 0.25dB, into high Z, -1.3dB
into 600 Ohms
Input Impedance: 20 kOhms, balanced
Output Impedance: 100 Ohms, balanced
Connectors: Phoenix screwtype, removable
Audio Channels, Unbalanced
Frequency response: 20Hz to 30KHz
Level: up to 2V, peak to peak
Input Impedance: 100K
Output impedance: 1K
Crosstalk: <-85dB@1KHz
Connectors: RCA
Controls
Controller: (optional) 20-key front panel keypad
RS232 connectors: 3)DB9P (female) from terminal devices
Power 100-120 or 200-240 VAC, 47 to 63 Hz, 300 Watts maximum
Power connector: grounded AC power cord
Dimensions 12U rackmount housing,
19” wide x 10” deep x 21” high
Shipping weight 60 pounds
Page 2
KNOX VIDEO
Chameleon256 Routing Switcher
Page 23
KNOX VIDEO
Chameleon256 Routing Switcher
SECTION 4. MAINTENANCE
CAUTION! Disconnect from power before removing top cover. Do not operate
unit with top cover removed.
4.1 INTRODUCTION
The Chameleon256 uses a combination of passive air flow (convection) and a
low-velocity fan to keep its dual front panel-mounted power supplies within a
comfortable operating temperature range. It is important to check for and correct
against an accumulation of dust at least annually, or more often in a dusty environ-
ment.
The CPU card and the optional front panel controller both have battery backed-
up memory for their crosspoint pattern storage and other non-volatile functions. It
is important to check the batteries annually and replace them when necessary. For
each board, the battery is a DL1220 type (one-half inch in diameter, 1/10 inch thick)
with a 3.2 volt rating. To avoid memory loss, replace the battery when the measured
voltage falls below 2.8 volts. Be sure the replacement battery is installed with the +
side visible.
No other routine maintenance is required in the Chameleon256.
4.2 SWITCH/JUMPER OPTIONS
Each crosspoint card has 8 jumper positions labeled J2-J3 for configuring the
cards.
Jumper positions 1 (far left) and 8 (far right) are used to identify whether a card
is a video or audio card:
Position 1: ON=VIDEO OFF=AUDIO
Position 8: ON=AUDIO OFF=VIDEO