Difference: PowerMeasurements600 (1 vs. 2)

Revision 223 Feb 2006 - Main.ShibaniBhattacharya

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Contents

Power Measurements for 600
- Low Power
- High Power

Power Measurements for 600

Low Power

Low power measurements: As of 12/8/05

The low power measurements were done with 1GHz oscilloscope via 1m RG241 cable. The high power measurements were done with power meter via approx. 40dB attn. The data in the tables is corrected for attenuation. 15N and 13C amplifier outputs were non-linear between -6dB and -3dB

Nucleus	SGU1 output	SGU2 output	SGU3 output	SGU4 output	Router 2 output	Amplifier input
13C	924mV					1.04V
1H		848mV				1.04V
15N			988mV		1.33V	1.67V
2H				960/980mV	1.09/1.11V	1.09/1.11V

High Power

Added:

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High power measurements: As of 02/22/06 (After replacing 15N Amplifier)

Measurement description	BLAX300 (15N), W
amplifier output @ -6dB no attenuation	461/489
amplifier output @ -6dB with attenuation	2dB, 433/459
probe input @ -6dB with attenuation	277/294
probe input @ -4.5dB with attenuation	193/205

40 us 15N 90 @ -4.3 dB (Probe spec'd for 222 W)

High power measurements made on 12/08/05 by Shibani: 600MHz_power_measurements.doc:

Measurement description	BLAX1 (13C), W	BLAH (1H), W	BLAX2 (15N), W
amplifier output @ -6dB no attenuation	191/217.7	51.5/68.5	311/335.9
amplifier output @ -6dB with attenuation	4dB, 98.2/112	9dB, 12.3/13.16	2dB, 241/260.3
probe input @ -6dB with attenuation	64.3/73.3	7.02/7.51	151/163.1

Linearity Check

Pulse calibration done on Urea/Methanol in DMSO

Nucleus	Power level, dB	Pulse length, us, 05/25/05	Pulse length, us, 05/17/05	Pulse length, us, 04/24/05
C13	-5dB	15	16.5	14
	1	30
	7	63
1H	-5	8.12
	-3	10.19
	0	14.25
	3	20.5
	6	28.25
15N	-6	40	40
	-5	44	49	43
	0	84
	6	170
	7.3	190
2H	non linear ???
	-	DMSO	Sucrose (90%H2O/10%D2O)
	-6	116.5	-
	-3	165.0	-
	0	212.5	211.5
	3.0	-	-
	5.2	-	380
	6.0	410	-

Previous Measurements

Low power measurements:

Nucleus	SGU1 output	SGU2 output	SGU3 output	SGU4 output	Router 2 output	Amplifier input
13C	916/934mV					1.02/1.04V
1H		850/901mV				932/987mV
15N			996V		1.37V	1.65V
2H				960/980mV	1.09/1.11V	1.09/1.11V

High power measurements:

Measurement description	BLAX1 (13C), W	BLAH (1H), W	BLAX2 (15N), W	BLAX3 (2H), W
amplifier output @ -6dB no attenuation	268/300	61/80	390/413	380/418
amplifier output @ -6dB with attenuation	4dB, 153/171	9dB, 11.5/15	2dB, 333/352	10dB, 36.6/40
probe input @ -6dB with attenuation	100/112	7.5/9.75	215/228	10/10.6

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-- MichaelGoger - 14 Dec 2005

META FILEATTACHMENT	attr="" comment="" date="1134572232" name="600MHz_power_measurements.doc" path="600 MHz_power_measurements.doc" size="42496" user="MichaelGoger" version="1.1"

Revision 114 Dec 2005 - Main.MichaelGoger

META TOPICPARENT	name="NmrStaffnotes"