LeCroy 1607 ECLine Pattern Generator

General Description

The LeCroy Model 1607 ECLine Pattern Generator generates two groups of outputs. The first group consists of a pattern of 32 differential ECL signals plus an ECL output signal, called the ECL Ready, which leads the pattern by approximately 2 nsec. The second group includes a NIM output and an ECL differential pair output termed NIM OUT and ECL OUT respectively. These two groups operate either in time with each other or completely independently. When in time, (termed STANDARD mode) the group II outputs lead the pattern by approximately 4 nsec. When independent (termed the SPLIT mode) not all functions are available at all outputs. Table I lists the four types of drivers available and which outputs can be driven in that manner under the two conditions. Note that external strobes never drive group outputs.

                                                                                        
                          TABLE I                                       
                                                                                        
                           GROUP I                  GROUP II            
                           STANDARD SPLIT           STANDARD SPLIT      
                                                                                        
 NIM OR ECL STROBE IN      YES          YES         NO           NO     
                                                                                        
 DC                        YES          YES         YES          NO     
 OSCILLATOR                YES          NO          YES          YES
 COMPUTER STROBE           YES          NO          YES          YES

The bits in the pattern which will be turned on during a strobe are selectively set either by a 32 bit internal register (if the lower front panel switch is in CAM position) or manually (switch in FP position) using a LeCroy 1620 switch box. The status of the internal register might be changed only under CAMAC control, using the write commands F(16)-A(0) W corresponding to the bits 1 to 16 in the pattern and F(16)-A(1)-W for the bits 17 to 32.

The strobe of the pattern is generated by the OR function of the NIM strobe, the ECL strobe, the internal 10 kHz oscillator or a computer generated pulse (the last two when enabled). When an external strobe drives the pattern the differential pulse width is the same as the input pulse width. When the computer or oscillator drives the pattern the width is determined by an adjustment time pot accessible from the side panel (10 to 100 nsec)

When operated in STANDARD mode DC always overrides all other conditions. When operated in SPLIT mode it only overrides group I outputs as noted in TABLE I.

Specifications

INPUTS:

STB -- NIM Strobe -- 2 High impedance Lemo inputs, bridged pair for daisy chaining.
STB -- ECL Strobe -- Two pin input connector for ECLine twisted pair wire input terminated in 100 Q.
These two inputs are OR'ed with a CAMAC-initiated strobe or an internal 10 kHz oscillator used to strobe the group I outputs.

MANUAL SWITCH REGISTER:

34-pin switch register connector - attaches to the 1607 via 34-pin ribbon cable to a LeCroy 1620, a 32 channel DIP switch register.

OUTPUTS:

PATTERN OUT 32 ECL pairs via two ECLine 34-pin connectors. Each output may be enabled and then strobed either manually or by /CAMAC command. If the front panel switch CAM/FP is in the CAM position the outputs are enabled via a CAMAC command to an internal register. The outputs may be strobed via a CAMAC generated pulse (pulse width side panel adjusted from 10-100 nsec) or via the front panel STB inputs. There is also an internal 10 kHz oscillator which strobes the PATTERN. It can be enabled via CAMAC or a front panel switch. When CAM/FP is in the FP position the 1620 switch register determines which bits will be turned ON during strobe time.

RDY -- ECL output ready -- available approximately 2 nsec ahead of the PATTERN OUT signals.

OUT - two types are available, one ECL and a bridged double NIM output. These signals when in sync with the PATTERN OUT and RDY appear roughly 4 nsec earlier. These two outputs can be driven separately from the PATTERN via CAMAC or the internal 10 kHz oscillator.

MANUAL:

CAM/FP:

2-position switch, selects between CAMAC and Front Panel Control.
CAM -- selects CAMAC control of the available options. (see PATTERN out above)
FP -- this position enables the functions of the upper switch and inhibits Q-responses to CAMAC commands so a system may be aware of the manual controls.

0-P-DC:

3-position switch. Active only if CAM/FP switch is in FP position.

0 -- strobes the PATTERN via a 10 kHz internal oscillator

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Specifications
INPUTS:	STB -- NIM Strobe -- 2 High impedance Lemo inputs, bridged pair for daisy chaining. STB -- ECL Strobe -- Two pin input connector for ECLine twisted pair wire input terminated in 100 Q. These two inputs are OR'ed with a CAMAC-initiated strobe or an internal 10 kHz oscillator used to strobe the group I outputs.
MANUAL SWITCH REGISTER:	34-pin switch register connector - attaches to the 1607 via 34-pin ribbon cable to a LeCroy 1620, a 32 channel DIP switch register.
OUTPUTS:	PATTERN OUT 32 ECL pairs via two ECLine 34-pin connectors. Each output may be enabled and then strobed either manually or by /CAMAC command. If the front panel switch CAM/FP is in the CAM position the outputs are enabled via a CAMAC command to an internal register. The outputs may be strobed via a CAMAC generated pulse (pulse width side panel adjusted from 10-100 nsec) or via the front panel STB inputs. There is also an internal 10 kHz oscillator which strobes the PATTERN. It can be enabled via CAMAC or a front panel switch. When CAM/FP is in the FP position the 1620 switch register determines which bits will be turned ON during strobe time. RDY -- ECL output ready -- available approximately 2 nsec ahead of the PATTERN OUT signals. OUT - two types are available, one ECL and a bridged double NIM output. These signals when in sync with the PATTERN OUT and RDY appear roughly 4 nsec earlier. These two outputs can be driven separately from the PATTERN via CAMAC or the internal 10 kHz oscillator.
MANUAL:
CAM/FP:	2-position switch, selects between CAMAC and Front Panel Control. CAM -- selects CAMAC control of the available options. (see PATTERN out above) FP -- this position enables the functions of the upper switch and inhibits Q-responses to CAMAC commands so a system may be aware of the manual controls.
0-P-DC:	3-position switch. Active only if CAM/FP switch is in FP position. 0 -- strobes the PATTERN via a 10 kHz internal oscillator