Specifications for the model vs-20 – Hall Research VS-20 User Manual
Page 3
Specifications for the Model VS-20
Equipment included:
• The VS-20 chassis
• UL approved 110 Vac power cord
• Control Keypad
• User’s Manual
Dimensions:
Page 3 of 4
12/01/05
:
L x W x H:
16.7” L x 9.58” W x 3.2” H (with 19” x 3.44” front panel)
Weight:
Base unit: 5 lbs, Keypad: 1 lbs
Video Specs
Connector HDD15
female
Coupling DC
Bandwidth
Over 250 MHz
Video Level
0.7 v p-p
Video Gain
1
Optional Equipment:
LED Display
Model HRED-202 Large LED Display Device
DIMENSIONS:
Display: 2.25" D x 12" W x 4" H
WEIGHT:
4.5 Lbs
Keypad Codes and RS-232 Protocol (Control from a PC Serial Port)
The Keypad that is shipped with the unit operates at 1200 Baud rate with one start bit (0) and one or more stop
bits (1), no parity. To tie the unit to a PC, use a DB9 F/F cross-over cable (Null Modem: 2<>3, 4<>6, 7<>8,
5=5).
Each key when pressed transmits a unique one byte “make code”, and when released a unique one byte “break
code”. Therefore, to simulate a keypad keystroke from a PC you must transmit a make code followed by a break
code.
Below are the keys that are decoded by the VS-20:
Keypad Button Make Code, ASCII
(HEX)
Break Code, ASCII
(HEX)
1 `
(60)
@
(40)
2 a
(61)
A
(41)
3 b
(62)
B
(42)
4 c
(63)
C
(43)
0 o
(6F)
O
(4F)
+ m
(6D)
M
(4D)
- l
(6C)
L
(4C)
Enter t
(74) T
(54)