Note: The maximum output of the binary models is FFF (Hex). The maximum output of
the BCD models is 999. In both instances "maximum" corresponds to an analog
programming voltage of ±10V or ±1V (depending on the range and polarity
- 1000V maximum between digital input and analog output.
- There are two channels: Channel A and Channel B. Channels "A" and "B" share a single common.
- The SN 488-B and SN 488-D provide a means of controlling positive or negative polarity. This feature is useful when the programmer controls a bipolar power supply like the Kepco BOP Series.
- The SN 488-B and SN 488-D provide a means of controlling range over a 10:1 ratio. This is accomplished by a programmable attenuator. The "high" range provides a 0 to ±10V analog output; the "low" range provides a 0 to ±1V analog output.
- The data code used is ASCII. The data format is hexadecimal for the Model SN 488-B and decimal (3-digit BCD) for the Model SN 488-D.
- 3 digit BCD (decimal). Resolution is 1 part in 999 (0.1%). 12 bit binary (hexadecimal) has a resolution of 1 part in 4095 (0.024%).
- Data Syntax: N = C AAA BBB (9 ASCII encoded characters). To "talk" to a power supply you should transmit a nine character set with the syntax:
- N = C AAA BBB
- N is the address of the particular program card to which you wish to "talk" (there are eight possible addresses from 0 to 7).
- "=" is the ASCII character, that separates the card address from data.
- C is the control character: 0,1,2, . . . .,F (See Truth Table).
- AAA is data as a percent of full scale (Channel A).
- BBB is data as a percent of full scale (Channel B).