Highland V850 Digital Delay Generator

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MODEL V850/V851 VME
DIGITAL DELAY GENERATORS

Features

Delay and width modes
40 (39.0625) picosecond LSB resolution with 32-bit (167.8 ms) full-scale delay range
Jitter <25 ps RMS typical
Adjustable trigger threshold and output levels.
Insertion delay of 25 ns
Optional NIM level outputs for all delay channels

TheV850/V851 is a single-width, 6U VME digital delay generator that accepts a single trigger input and generates four or six separately programmable delay outputs. The four or six channel delays may be combined in sequences to create two or three delay-and-width outputs. The module features a 32-bit dynamic range, 40-ps resolution, low jitter, and high rep-rate capability.

All channels are triggered simultaneously, and the module generates a "T0" edge 25 ns after the trigger, and four or six following delays, each programmable from 0 to 167.8 ms.

The outputs can also be configured to generate widths. This mode uses two channels, 1 and 2, to generate a pulse whose incidence is determined by Channel 1's timing value and whose termination is determined by Channel 2's timing value. Similarly, Channels 3 and 4 , and 4 and 6 in the V851, can be combined to operate in the width mode.

The V850/V851 delay parameters may be programmed on-the-fly at VMEbus speeds without any generation of erroneous delays. All delay channels can be updated coherently.

Model V850 and V851 VME Digital Delay Generator Specifications

CONFORMANCE	ANSI/IEEE 1014-1987 VMEbus specification. VXIC specification, Rev1.4.
DEVICE TYPE	Register based slave: A16:D16:D08(EO).
POWER REQUIRED	V850 4-channel version: +5: 2.25A max; +12: 1.2A max at startup, 700mA after warm-up; -12: 975mA max at startup, 500mA max after warm-up V851 6-channel version +5: 3.0A max; +12: 1.5A max at startup, 825mA max after warm-up; -12: 1.1A max at startup, 550mA after warm-up
PACKAGING	Single-width, 6U VME, B-size VXI module.
TIMING CHANNELS	Four or six timing channels (1 - 4 or 1-6). In DELAY mode, the V850/V851 produces four/six independent delays. In WIDTH mode, channels 1 and 2 (as well as 3 and 4 and 5 and 6) allow the generation of pulses with programmable delay and duration.
TRIGGERING	Triggers can be selected from front panel EXT TRG, internal source, or VMEbus command trigger.
REP RATE	Up to 2.5MHz
INSERTION DELAY	25ns
RESOLUTION	39.0625 ps LSB (equivalent to a clock rate of 25.6 GHz)
RANGE	32 bits allows a full scale range of 167.7722 ms on all channels
JITTER	Less than (50 ps + 1E-9 x programmed delay) RMS
ACCURACY	+- (500 ps + timebase stability)
TIMEBASE	Ovenized oscillator. Temperature coefficient<10 ppB/deg C; aging below 1ppM/year. Oscillator may be phase locked to a 10 MHz external reference via the front panel CLOCK I/O connector.
INPUTS	EXT TRG: Adjustable threshold level +-2.5V, slope, and termination (Hi-Z, 50 ohms to ground).
OUTPUTS	One fixed position marker (T0) and four or six delay (1- 4 or 1-6) outputs. In the DELAY mode, a given timing channel is routed to the similarly numbered output. In the WIDTH mode, the width waveform generated timing channels 1 and 2, are routed to output 2, with 3 and 4 routed to output 4, and, for the V851, 5 and 6 routed to 6. All outputs are commonly adjustable for a baseline of 0 to -2.5 volts and amplitude of 0 to +5 volts. The slew rates are better than 2V/nSec
CONNECTORS	Std: SMB, Options: LEMO; LEMO with independent NIM outputs

Highland Technology V850/V851 VME Digital Delay Generator Manual