RS232 serial port output noise spectrum analyzer
- Category: >>>
- Supplier: Beijing Jinghaiming Electronic Technology Research Institute
Share on (1600640732846):
Product Overview
Description
Product display
Portdefinition:
Red line connected to power supply, black wire grounding, white wire RS232 signal output terminal, RS232 communication mode 38400,n, 8,1, output interval 500ms / time.
Red line connected to power supply, black wire grounding, white wire RS232 signal output terminal, RS232 communication mode 38400,n, 8,1, output interval 500ms / time.
Output package format:
Start character 0xff (1byte) + Device ID (8byte) + Data Length (1byte) + Frequency point amplitude value (31byte) + The decimalpart (16byte) + The CRC calibration value is high (1byte) + CRC calibration low test value (1byte).
a.Start character: 0xff.
b.Device ID 7 bytes: string "JHM-NF18", corresponding to 16 binant data 0x4a 0x48 0x4d 0x2d 0x4e 0x46 0x31 0x38 .
Start character 0xff (1byte) + Device ID (8byte) + Data Length (1byte) + Frequency point amplitude value (31byte) + The decimalpart (16byte) + The CRC calibration value is high (1byte) + CRC calibration low test value (1byte).
a.Start character: 0xff.
b.Device ID 7 bytes: string "JHM-NF18", corresponding to 16 binant data 0x4a 0x48 0x4d 0x2d 0x4e 0x46 0x31 0x38 .
c. Data Length 0x2f (31 + 16).
d.31 Point amplitude dB value integer part: Point F (n) = n * 200Hz (0 <n<32),amplitude per unit of decibel dB.
d.31 Point amplitude dB value integer part: Point F (n) = n * 200Hz (0 <n<32),amplitude per unit of decibel dB.
<32),amplitude per unit of decibel db.
e. 16 Byte decimal part, in order to reduce the communication time, the decimal part is combined processing,the decimals of the frequency points F (2n) and F (2n + 1) are merged into 1 byte.
f. The CRC check value, the CRCH and C R C L of the 47-byte data part only.
e. 16 Byte decimal part, in order to reduce the communication time, the decimal part is combined processing,the decimals of the frequency points F (2n) and F (2n + 1) are merged into 1 byte.
f. The CRC check value, the CRCH and C R C L of the 47-byte data part only.
Product model | JHM-NF18 |
Appearance specifications | 80mmX25mm |
Measurement error | +/- 1.5dB（2KHz 94dBcheck） |
Conversion accuracy | 0.1dB |
Output mode | RS232 Interface output(38400.n.8.1) |
Measuring range | 30dB ---- 130dB(Automatic shift) |
Frequency response | 35 Hz to 20KHz |
Frequency resolution | 200Hz |
Frequency of sampling | 25.6KHz(128 Point sampling) |
Working and storage temperature | -10 ----- 60℃ |
Working and storage humidity | 10 ----- 90RH% |
Power standard | DC9 - 12V(Ripple <0.5%) current 30Ma |
Main products
Company information
Package & Transport
FAQ
Q1: Are you Manufacturer or trading company?
A: We are Manufacturer more than 15 years experience in Beijing China
Q2: How long is the delivery time for bulk order?
A: It depends on the order quantity, normally the delivery time will be 15-30 working
days. Pls kindly contact us before order.
Q3: OEM/ODM service available?
A: Yes, we accept OEM/ODM.
Q4: If I need customize Packing Cartons, is that available.
A: Yes, we have production line for packing box and cartons. we can make it according to your special requirement.
Q5: How to guarantee the Quality.
A: Yes, we have strict control of the quality from the raw material to finished products according to ISO9001 QC system.
We guarantee all products are 100% qualified and backed by lifetime warranty.
Q6:How will you delivery my order?
A: Normally for the order quantity less than 45 kgs, we send by Express; from 45-200kgs we suggest to send by Air. For Bulk order,
we will send by Sea. It all depends, we will compare and find the best solutions.
A: We are Manufacturer more than 15 years experience in Beijing China
Q2: How long is the delivery time for bulk order?
A: It depends on the order quantity, normally the delivery time will be 15-30 working
days. Pls kindly contact us before order.
Q3: OEM/ODM service available?
A: Yes, we accept OEM/ODM.
Q4: If I need customize Packing Cartons, is that available.
A: Yes, we have production line for packing box and cartons. we can make it according to your special requirement.
Q5: How to guarantee the Quality.
A: Yes, we have strict control of the quality from the raw material to finished products according to ISO9001 QC system.
We guarantee all products are 100% qualified and backed by lifetime warranty.
Q6:How will you delivery my order?
A: Normally for the order quantity less than 45 kgs, we send by Express; from 45-200kgs we suggest to send by Air. For Bulk order,
we will send by Sea. It all depends, we will compare and find the best solutions.
We Recommend
New Arrivals
New products from manufacturers at wholesale prices
