Knox Video Chameleon256 Series - Manual (Page 6)

SECTION 1. GENERAL INFORMATION
1.1 INTRODUCTION
The Knox Chameleon256 Routing Switchers are high-bandwidth or medium-
bandwidth modular audio/video routing switchers with a capacity of up to 256
inputs and 256 outputs.
1.2 TECHNICAL DESCRIPTION
The Chameleon256 Switchers are housed in a 12U rackframe. They have an
optional front panel keypad controller [on the front panel], and three DB9 female
connectors on the rear panel, two for RS232 inputs from external Knox controllers
or other RS232 terminal devices and one for daisy-chaining to other Knox Chame-
leon chassis.
1.3 DETAIL SPECIFICATIONS
Video
Frequency response-HB: DC to 200MHz,
300mV: <-3dB@150MHz
1.0V: <-3dB@115MHz
Frequency response-MB: DC to 30MHz,
1.0V: +/- 0.5dB to 20MHz
1.0V: <-3dB@30MHz
Input impedance: 75 ohm
Output impedance: 75 ohm
Crosstalk: all hostile:
typ <-60dB@5MHz
typ <-50dB@20MHz
typ <-25dB@100MHz
one hostile:
<-40dB@200MHz
Connectors: BNC
Page 1
KNOX VIDEO
Chameleon256 Routing Switcher
Jumper position 2 is used to identify a board as being a BALANCED AUDIO
board. This is necessary for Balanced Audio boards because the maximum number
of inputs on balanced audio main board is 64; inputs from 64 to 128 require an AUX
board.
Jumper positions 3 through 7 are used to modify the card’s apparent position
in the chassis to allow simultaneous switching of multiple cards, as with stereo
audio or component video. With these jumper positions OFF each board has an
address from 0 to 15; adding the jumpers modifies the card address as follows:
Position 3: ON=subtract 2 from the real address
Position 4: ON=subtract 4 from the real address
Position 5: ON=subtract 8 from the real address
For example, to have a card in the 9 th slot (outputs 65-96) switch as though it
is in the first slot (outputs 1-32), add jumper 5. To have a card in the 15 th slot
switch as though it is in the 9 th slot, add jumpers 3 and 4.
Page 24
KNOX VIDEO
Chameleon256 Routing Switcher