Transient recorder model selection

model name TR XX-YYY-opt.

XX	=	sample rate (for analog and photon counting), defines the ADC clock and photon counter readout cycle time.
20	=	20 MHz, standard (7.5 m range resolution)
40	=	40 MHz, for high resolution systems (3.75 m range resolution)

lower sample rate is possible, but it limits the max. average photon count rate (not the pulse pair resolution)

YYY	=	FIFO memory length, defines the max. signal length and the max. repetition rate
160	=	16384 databins, standard, lidar signals up to 819.2µs or 122.88 km, max. rep. rate=300 Hz.
80	=	8192 databins, lidar signals up to 409.6µs or 61.44 km, max. rep. rate=610 Hz.

for other combinations see list below.

options:

AP	=	separated inputs for analog and photon counting. Makes sense for APD users who also detect weak PMT signals (Raman signals, etc). One trigger source - two detectors (APD + PMT in photon counting).
opt.	=	optical trigger input.(Trigger source is a SMA Emitter). Additional galvanically decoupling. Only for very noisy laser sources (Excimer, flashlamp pumped Ti:Sapphire lasers). Our standard electrical trigger is already galvanically decoupled.
las	=	optical trigger with laser pulse as trigger source. Includes a photodiode and a fast Schmitt Trigger with variable threshold. Application: Passive Q-switched lasers (mini lidars).

Memory selection chart

Transient recorder memory/range resol./repetition rate

	model No.	TR 10	TR 20	TR 40	unit
	sample rate	10	20	40	MHz
memory	range resol.	15	7.5	3.75	m
256	max. rep. rate	15.62	19.53	22.32	kHz
256	max signal	3.84	1.92	0.96	km
512	max. rep. rate	7.81	9.76	11.16	kHz
512	max signal	7.68	3.84	1.92	km
1K	max. rep. rate	3.90	4.88	5.58	kHz
1K	max signal	15.36	7.68	3.84	km
2 K	max. rep. rate	1.95	2.44	2.79	kHz
2 K	max signal	30.72	15.36	7.68	km
8 K	max. rep. rate	0.488	0.61	0.69	kHz
8 K	max signal	122.88	61.44	30.72	km
16 K	max. rep. rate	0.24	0.30	0.34	kHz
16 K	max signal	245.76	122.88	61.44	km

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