Outline

Upper section : USB transceiver unit
Lower section : QPSK transmission unit

It will be installed on the small satellite and perform the command reception from theground, and the telemetry transmission to the ground using 2GHz wave band.

Features
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Flight proven
Lower cost using COTS parts
The 2-way Doppler measurement function controls the transmission frequency
depending on the reception frequency of the command signal from the ground.
1Mbps high speed communication (QPSK)Control for switch of USB/QPSK transmission and switch of coherent（2-Way Doppler）/incoherent mode is available
Monitoring the status of the transceiver (transmission and reception status, internal
temperature and the setting status of each mode)
In case only USB is required, it will be realized by the sole operation of the upper unit.
Tolerant of the severe environment of small satellite
ITAR free
RoHS nonconformity
Made in Japan＊ This product was developed in the support of JAXA.
＊ Note that, with due to the rights of other relevant parties and/or depending on usage application and/or delivery place theproducts may not be sold commercially distributed, leased or included in a part of product or system which intends to receive
benefits through the inclusion of the product.

MEISEI ELECTRIC CO., LTD.

SPECIFICATIONS
Items

Performance

ReceivingperformanceUSBtransmission
performance
QPSK
transmission
performance

Reception frequency

2 GHz band

Modulation

PCM(NRZ-L)-PSK-PM

Receiving sensitivity＜ -100 dBm

Sub carrier frequency

16 kHzCommand bit rate

4 kbpsTransmission
frequency

2 GHz band

Modulation

PCM(Biφ-L)-PM

Transmission output+10 dBm(Typ.)

Telemetry bit rate

16 kbps

Transmission
frequency

2 GHz band

Modulation

QPSK

Transmission output+27 dBm(Typ.)

Telemetry bit rate

1 MbpsPower supply voltage+17 to 35 VDC＜ 2.8 W (standby)

Other performance

Power consumption＜ 15 W (QPSK transmission)Operating temperaturerange-10 to +50℃

Dimensions

198 x 120 x 38.8 mm(flange and screw not included)Mass＜ 1.65 kg

Lead time

About 12 months after receiving orders.

Flight heritage

SDS-4
SOCRATESCaution
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＜ 3.8 W (USB transmission)

For safe and correct usage, please read the "Operation
Manual" prior to the use of the products.
Specifications and designs are subject to change withoutnotice.
Specifications and designs are based on the standard model.
Please contact us regarding further customization to suit
your project’s needs.
This products may be subject to the application of theForeign Exchange and Foreign Trade Act and other related
laws and regulations in Japan. Customer agrees to comply
with such regulations and acknowledges that it is their
responsibility to obtain any required licenses to export, reexport, or import this products.
We shall not be liable for any damages arising out of or inconnection with the use of specifications herein, including
liability for lost profit, business interruption, or any otherdamages whatsoever.
The color of the product photography on catalog might bedifferent from that of actual product because of printing.

www.meisei.co.jp/english
E-mail: aerospace@meisei.co.jp
Headquarters:
2223 Naganumamachi, Isesaki-shi,
Gunma 372-8585, Japan
Tel: +81-270-32-1117 Fax: +81-270-32-0988
Aerospace & Defense Systems Div.

Tokyo Branch:
TOYOSU IHI BUILDING 10F, 1-1, Toyosu 3-chome,
Koto-ku, Tokyo 135-8115, Japan
Tel: +81-3-6204-8252 Fax: +81-3-6204-8888
Sales & Marketing Dept.
Aerospace & Defense Systems Div.

MEISEI ELECTRIC CO., LTD.
MSPA4-046 M2007

The specifications in this catalog are current as of July 2020.